diff --git a/CHANGES b/CHANGES
index c3a9a0492..993eef2b4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3,6 +3,7 @@ Version 1.5.2-dev (development of upcoming release)
 * ..
 
 Version 1.5.1 (2024-07-27)
+* Fix bug: Check if Include folders/files do exists (in case they are removed) (#1586) (@rafaelhdr)
 * Fix: Use correct port to ping SSH Proxy (#1815)
 
 Version 1.5.0 (2024-07-26)
diff --git a/common/backintime.py b/common/backintime.py
index ed9fdab77..d78773703 100644
--- a/common/backintime.py
+++ b/common/backintime.py
@@ -48,6 +48,7 @@
 
 parsers = {}
 
+
 def takeSnapshotAsync(cfg, checksum = False):
     """
     Fork a new backintime process with 'backup' command which will
@@ -82,6 +83,7 @@ def takeSnapshotAsync(cfg, checksum = False):
             pass
     subprocess.Popen(cmd, env = env)
 
+
 def takeSnapshot(cfg, force = True):
     """
     Take a new snapshot.
@@ -98,6 +100,7 @@ def takeSnapshot(cfg, force = True):
     ret = snapshots.Snapshots(cfg).backup(force)
     return ret
 
+
 def _mount(cfg):
     """
     Mount external filesystems.
@@ -113,6 +116,7 @@ def _mount(cfg):
     else:
         cfg.setCurrentHashId(hash_id)
 
+
 def _umount(cfg):
     """
     Unmount external filesystems.
@@ -125,6 +129,7 @@ def _umount(cfg):
     except MountException as ex:
         logger.error(str(ex))
 
+
 def createParsers(app_name = 'backintime'):
     """
     Define parsers for commandline arguments.
@@ -620,6 +625,7 @@ def join(args, subArgs):
 
     return args
 
+
 def printHeader():
     """
     Print application name, version and legal notes.
@@ -633,6 +639,7 @@ def printHeader():
     print("under certain conditions; type `backintime --license' for details.")
     print('')
 
+
 class PseudoAliasAction(argparse.Action):
     """
     Translate '--COMMAND' into 'COMMAND' for backwards compatibility.
@@ -659,6 +666,7 @@ def __call__(self, parser, namespace, values, option_string=None):
         setattr(namespace, 'replace', replace)
         setattr(namespace, 'alias', alias)
 
+
 def aliasParser(args):
     """
     Call commands which where given with leading -- for backwards
@@ -676,6 +684,7 @@ def aliasParser(args):
     if 'func' in dir(newArgs):
         newArgs.func(newArgs)
 
+
 def getConfig(args, check = True):
     """
     Load config and change to profile selected on commandline.
@@ -713,6 +722,7 @@ def getConfig(args, check = True):
         cfg.forceUseChecksum = args.checksum
     return cfg
 
+
 def setQuiet(args):
     """
     Redirect :py:data:`sys.stdout` to ``/dev/null`` if ``--quiet`` was set on
@@ -734,6 +744,7 @@ def setQuiet(args):
         atexit.register(force_stdout.close)
     return force_stdout
 
+
 class printLicense(argparse.Action):
     """
     Print custom license
@@ -746,6 +757,7 @@ def __call__(self, *args, **kwargs):
         print(license_path.read_text('utf-8'))
         sys.exit(RETURN_OK)
 
+
 class printDiagnostics(argparse.Action):
     """
     Print information that is helpful for the support team
@@ -764,6 +776,7 @@ def __call__(self, *args, **kwargs):
 
         sys.exit(RETURN_OK)
 
+
 def backup(args, force = True):
     """
     Command for force taking a new snapshot.
@@ -783,6 +796,7 @@ def backup(args, force = True):
     ret = takeSnapshot(cfg, force)
     sys.exit(int(ret))
 
+
 def backupJob(args):
     """
     Command for taking a new snapshot in background. Mainly used for cronjobs.
@@ -798,6 +812,7 @@ def backupJob(args):
     """
     cli.BackupJobDaemon(backup, args).start()
 
+
 def shutdown(args):
     """
     Command for shutting down the computer after the current snapshot has
@@ -842,6 +857,7 @@ def shutdown(args):
         sd.shutdown()
     sys.exit(RETURN_OK)
 
+
 def snapshotsPath(args):
     """
     Command for printing the full snapshot path of current profile.
@@ -864,6 +880,7 @@ def snapshotsPath(args):
     print(msg.format(cfg.snapshotsFullPath()), file=force_stdout)
     sys.exit(RETURN_OK)
 
+
 def snapshotsList(args):
     """
     Command for printing a list of all snapshots in current profile.
@@ -894,6 +911,7 @@ def snapshotsList(args):
         _umount(cfg)
     sys.exit(RETURN_OK)
 
+
 def snapshotsListPath(args):
     """
     Command for printing a list of all snapshots paths in current profile.
@@ -924,6 +942,7 @@ def snapshotsListPath(args):
         _umount(cfg)
     sys.exit(RETURN_OK)
 
+
 def lastSnapshot(args):
     """
     Command for printing the very last snapshot in current profile.
@@ -950,6 +969,7 @@ def lastSnapshot(args):
     _umount(cfg)
     sys.exit(RETURN_OK)
 
+
 def lastSnapshotPath(args):
     """
     Command for printing the path of the very last snapshot in
@@ -978,6 +998,7 @@ def lastSnapshotPath(args):
         _umount(cfg)
     sys.exit(RETURN_OK)
 
+
 def unmount(args):
     """
     Command for unmounting all filesystems.
@@ -995,6 +1016,7 @@ def unmount(args):
     _umount(cfg)
     sys.exit(RETURN_OK)
 
+
 def benchmarkCipher(args):
     """
     Command for transferring a file with scp to remote host with all
@@ -1018,6 +1040,7 @@ def benchmarkCipher(args):
         logger.error("SSH is not configured for profile '%s'!" % cfg.profileName())
         sys.exit(RETURN_ERR)
 
+
 def pwCache(args):
     """
     Command for starting password cache daemon.
@@ -1048,6 +1071,7 @@ def pwCache(args):
         daemon.run()
     sys.exit(ret)
 
+
 def decode(args):
     """
     Command for decoding paths given paths with 'encfsctl'.
@@ -1082,6 +1106,7 @@ def decode(args):
     _umount(cfg)
     sys.exit(RETURN_OK)
 
+
 def remove(args, force = False):
     """
     Command for removing snapshots.
@@ -1102,6 +1127,7 @@ def remove(args, force = False):
     _umount(cfg)
     sys.exit(RETURN_OK)
 
+
 def removeAndDoNotAskAgain(args):
     """
     Command for removing snapshots without asking before remove
@@ -1116,6 +1142,7 @@ def removeAndDoNotAskAgain(args):
     """
     remove(args, True)
 
+
 def smartRemove(args):
     """
     Command for running Smart-Removal from Terminal.
@@ -1149,6 +1176,7 @@ def smartRemove(args):
         logger.error('Smart Removal is not configured.')
         sys.exit(RETURN_NO_CFG)
 
+
 def restore(args):
     """
     Command for restoring files from snapshots.
@@ -1178,6 +1206,7 @@ def restore(args):
     _umount(cfg)
     sys.exit(RETURN_OK)
 
+
 def checkConfig(args):
     """
     Command for checking the config file.
@@ -1205,5 +1234,6 @@ def checkConfig(args):
               file = force_stdout)
         sys.exit(RETURN_ERR)
 
+
 if __name__ == '__main__':
     startApp()
diff --git a/common/snapshots.py b/common/snapshots.py
index 5ecddd6e1..f3732c98e 100644
--- a/common/snapshots.py
+++ b/common/snapshots.py
@@ -15,7 +15,6 @@
 # You should have received a copy of the GNU General Public License along
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-import json
 import os
 from pathlib import Path
 import stat
@@ -698,6 +697,23 @@ def remove(self, sid):
 
             return True
 
+    def _check_included_sources_exist_on_take_snapshot(self, config):
+        """
+        Check if files and/or folders in the include list exist on the source.
+
+        If a file or folder does not exist, a warning message is logged.
+
+        Args:
+            cfg (config.Config): config that should be used
+        """
+        missing = has_missing_includes(config.include())
+
+        if missing:
+            msg = ', '.join(missing)
+            msg = f'The following **files/**folders are missing: {msg}'
+            logger.warning(msg)
+            self.setTakeSnapshotMessage(1, msg)
+
     # TODO Refactor: This functions is extremely difficult to understand:
     #  - Nested "if"s
     #  - Fuzzy names of classes, attributes and methods
@@ -807,6 +823,7 @@ def backup(self, force=False):
                     else:
                         self.config.setCurrentHashId(hash_id)
 
+                    self._check_included_sources_exist_on_take_snapshot(self.config)
                     include_folders = self.config.include()
 
                     if not include_folders:
@@ -3088,6 +3105,25 @@ def lastSnapshot(cfg):
         return sids[0]
 
 
+def has_missing_includes(included):
+    """
+    Check if there are missing files or folders in a snapshot.
+
+    Args:
+        included (list):    list of tuples (item, info)
+
+    Returns:
+        tuple:              (bool, str) where bool is ``True`` if there are
+                            missing files or folders and str is a message
+                            describing the missing files or folders
+    """
+    not_found = []
+    for path, info in included:
+        if not os.path.exists(path):
+            not_found.append(path)
+    return not_found
+
+
 if __name__ == '__main__':
     config = config.Config()
     snapshots = Snapshots(config)
diff --git a/qt/app.py b/qt/app.py
index 8936483e0..35825dc2c 100644
--- a/qt/app.py
+++ b/qt/app.py
@@ -1242,12 +1242,27 @@ def updateTimeLine(self, refreshSnapshotsList=True):
                 item = self.timeLine.addSnapshot(sid)
             self.timeLine.checkSelection()
 
+    def validate_on_take_snapshot(self):
+        missing = snapshots.has_missing_includes(self.config.include())
+        if missing:
+            msg_missing = '\n'.join(missing)
+            msg = _('The following folders are missing: {folders} Do you want to proceed?'.format(
+                folders=f'\n{msg_missing}\n\n'))
+            answer = messagebox.warningYesNo(self, msg)
+            return answer == QMessageBox.StandardButton.Yes
+        return True
+
     def btnTakeSnapshotClicked(self):
-        backintime.takeSnapshotAsync(self.config)
-        self.updateTakeSnapshot(True)
+        self._take_snapshot_clicked(checksum=False)
 
     def btnTakeSnapshotChecksumClicked(self):
-        backintime.takeSnapshotAsync(self.config, checksum = True)
+        self._take_snapshot_clicked(checksum=True)
+
+    def _take_snapshot_clicked(self, checksum):
+        if not self.validate_on_take_snapshot():
+            return
+
+        backintime.takeSnapshotAsync(self.config, checksum=checksum)
         self.updateTakeSnapshot(True)
 
     def btnStopTakeSnapshotClicked(self):
@@ -1993,6 +2008,7 @@ def eventFilter(self, receiver, event):
             return super(ExtraMouseButtonEventFilter, self) \
                 .eventFilter(receiver, event)
 
+
 class RemoveSnapshotThread(QThread):
     """
     remove snapshots in background thread so GUI will not freeze
@@ -2028,6 +2044,7 @@ def run(self):
         if self.config.inhibitCookie:
             self.config.inhibitCookie = tools.unInhibitSuspend(*self.config.inhibitCookie)
 
+
 class FillTimeLineThread(QThread):
     """
     add snapshot IDs to timeline in background
@@ -2045,6 +2062,7 @@ def run(self):
 
         self.parent.snapshotsList.sort()
 
+
 class SetupCron(QThread):
     """
     Check crontab entries on startup.