diff --git a/cinder/volume/drivers/nimble.py b/cinder/volume/drivers/nimble.py
index 598824373d5..ecbad7647c2 100644
--- a/cinder/volume/drivers/nimble.py
+++ b/cinder/volume/drivers/nimble.py
@@ -137,6 +137,9 @@ class NimbleBaseVolumeDriver(san.SanDriver):
     # ThirdPartySystems wiki page
     CI_WIKI_NAME = "Nimble_Storage_CI"
 
+    # TODO(jsbryant) Remove driver in the 'U' release if CI is not fixed.
+    SUPPORTED = False
+
     def __init__(self, *args, **kwargs):
         super(NimbleBaseVolumeDriver, self).__init__(*args, **kwargs)
         self.APIExecutor = None
diff --git a/doc/source/reference/support-matrix.ini b/doc/source/reference/support-matrix.ini
index 96bbd837944..38d0958578b 100644
--- a/doc/source/reference/support-matrix.ini
+++ b/doc/source/reference/support-matrix.ini
@@ -246,7 +246,7 @@ driver.netapp_ontap=complete
 driver.netapp_solidfire=complete
 driver.nexenta=complete
 driver.nfs=complete
-driver.nimble=complete
+driver.nimble=missing
 driver.oracle_zfssa=complete
 driver.prophetstor=complete
 driver.pure=complete
diff --git a/releasenotes/notes/nimble-mark-usnsupported-0c8e5e21c8d1179d.yaml b/releasenotes/notes/nimble-mark-usnsupported-0c8e5e21c8d1179d.yaml
new file mode 100644
index 00000000000..0709a3961f2
--- /dev/null
+++ b/releasenotes/notes/nimble-mark-usnsupported-0c8e5e21c8d1179d.yaml
@@ -0,0 +1,14 @@
+---
+upgrade:
+  - |
+    The Nimble driver has been marked as unsupported and is now
+    deprecated. ``enable_unsupported_driver`` will need to be set
+    to ``True`` in the driver's section in cinder.conf to continue
+    to use it.
+deprecations:
+  - |
+    The Nimble driver has been marked as unsupported and is now
+    deprecated. ``enable_unsupported_driver`` will need to be set
+    to ``True`` in the driver's section in cinder.conf to continue
+    to use it. If its support status does not change, it will be
+    removed in the 'U' development cycle.