diff --git a/cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_cinder.yaml b/cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_cinder.yaml
index d8cc606ee5e..a506f589a4f 100644
--- a/cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_cinder.yaml
+++ b/cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_cinder.yaml
@@ -127,6 +127,12 @@ test_delete_async_volume:
 test_delete_async_volume_migrating:
   volume: *volume_base
 
+test_delete_async_volume_not_from_snapshot:
+  volume: *volume_base
+
+test_delete_async_volume_from_snapshot:
+  volume: *volume_base
+
 test_retype_need_migration_when_host_changed:
   volume: *volume_base
   host:
diff --git a/cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_vnx.yaml b/cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_vnx.yaml
index e2a1c95327b..cbeb9606236 100644
--- a/cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_vnx.yaml
+++ b/cinder/tests/unit/volume/drivers/dell_emc/vnx/mocked_vnx.yaml
@@ -1480,6 +1480,20 @@ test_delete_async_volume_migrating:
       get_lun: *lun_used_by_feature
       get_snap: *snap_test_delete_async_volume
 
+test_delete_async_volume_not_from_snapshot:
+  vnx:
+    _methods:
+      get_lun: *lun_test_delete_lun
+
+test_delete_async_volume_from_snapshot:
+  snap: &snap_test_delete_async_volume_from_snapshot
+    _methods:
+      delete:
+  vnx:
+    _methods:
+      get_lun: *lun_test_delete_lun
+      get_snap: *snap_test_delete_async_volume_from_snapshot
+
 test_enable_compression:
   lun:
     _properties:
diff --git a/cinder/tests/unit/volume/drivers/dell_emc/vnx/test_adapter.py b/cinder/tests/unit/volume/drivers/dell_emc/vnx/test_adapter.py
index 0f30a9d5a51..410d452faf0 100644
--- a/cinder/tests/unit/volume/drivers/dell_emc/vnx/test_adapter.py
+++ b/cinder/tests/unit/volume/drivers/dell_emc/vnx/test_adapter.py
@@ -450,6 +450,31 @@ class TestCommonAdapter(test.TestCase):
         lun = vnx_common.client.vnx.get_lun()
         lun.delete.assert_called_with(force_detach=True, detach_from_sg=True)
 
+    @res_mock.mock_driver_input
+    @res_mock.patch_common_adapter
+    def test_delete_async_volume_not_from_snapshot(self, vnx_common, mocked,
+                                                   mocked_input):
+        volume = mocked_input['volume']
+        volume.metadata = {'async_migrate': 'True'}
+        vnx_common.force_delete_lun_in_sg = True
+        vnx_common.delete_volume(volume)
+        lun = vnx_common.client.vnx.get_lun()
+        lun.delete.assert_called_with(force_detach=True, detach_from_sg=True)
+
+    @res_mock.mock_driver_input
+    @res_mock.patch_common_adapter
+    def test_delete_async_volume_from_snapshot(self, vnx_common, mocked,
+                                               mocked_input):
+        volume = mocked_input['volume']
+        volume.metadata = {'async_migrate': 'True'}
+        volume.snapshot_id = 'snap'
+        vnx_common.force_delete_lun_in_sg = True
+        vnx_common.delete_volume(volume)
+        lun = vnx_common.client.vnx.get_lun()
+        lun.delete.assert_called_with(force_detach=True, detach_from_sg=True)
+        snap = vnx_common.client.vnx.get_snap()
+        snap.delete.assert_called_with()
+
     @utils.patch_extra_specs_validate(side_effect=exception.InvalidVolumeType(
         reason='fake_reason'))
     @res_mock.patch_common_adapter
diff --git a/cinder/volume/drivers/dell_emc/vnx/adapter.py b/cinder/volume/drivers/dell_emc/vnx/adapter.py
index 411323007c9..88d4a35dc2f 100644
--- a/cinder/volume/drivers/dell_emc/vnx/adapter.py
+++ b/cinder/volume/drivers/dell_emc/vnx/adapter.py
@@ -801,8 +801,8 @@ class CommonAdapter(replication.ReplicationAdapter):
             # for later deletion
             self.client.delay_delete_lun(volume.name)
         # Case 2. Migration already finished, try to delete the temp snap
-        # only when it's a cloned volume.
-        if async_migrate and volume.source_volid:
+        # when it's a cloned volume or created from snapshot.
+        if async_migrate and (volume.source_volid or volume.snapshot_id):
             self.client.delete_snapshot(utils.construct_snap_name(volume))
 
     def extend_volume(self, volume, new_size):
diff --git a/cinder/volume/drivers/dell_emc/vnx/driver.py b/cinder/volume/drivers/dell_emc/vnx/driver.py
index e809a279635..ec2018dfc06 100644
--- a/cinder/volume/drivers/dell_emc/vnx/driver.py
+++ b/cinder/volume/drivers/dell_emc/vnx/driver.py
@@ -84,9 +84,11 @@ class VNXDriver(driver.ManageableVD,
           12.1.2 - Fix bug https://bugs.launchpad.net/cinder/+bug/1817385 to
                    make sure sg can be created again after it was destroyed
                    under `destroy_empty_stroage_group` setting to `True`
+          12.1.3 - Fix bug 1794646: failed to delete LUNs from backend due to
+                   the temporary snapshots on them wasn't deleted.
     """
 
-    VERSION = '12.01.02'
+    VERSION = '12.01.03'
     VENDOR = 'Dell EMC'
     # ThirdPartySystems wiki page
     CI_WIKI_NAME = "EMC_VNX_CI"
diff --git a/releasenotes/notes/vnx-fail-delete-lun-due-to-tmp-snapshot-edd3cdd85e28be60.yaml b/releasenotes/notes/vnx-fail-delete-lun-due-to-tmp-snapshot-edd3cdd85e28be60.yaml
new file mode 100644
index 00000000000..61d882bc44b
--- /dev/null
+++ b/releasenotes/notes/vnx-fail-delete-lun-due-to-tmp-snapshot-edd3cdd85e28be60.yaml
@@ -0,0 +1,9 @@
+---
+fixes:
+  - |
+    Dell EMC VNX Cinder Driver: Fixes `bug 1794646
+    <https://bugs.launchpad.net/cinder/+bug/1794646>`__ to delete the LUN from
+    the VNX storage. Because a temporary snapshot is created from the LUN
+    during creating a volume from a snapshot and isn't deleted, the LUN cannot
+    be deleted before its snapshot is deleted. The fix makes sure the temp
+    snapshot is deleted.