diff --git a/homeassistant/components/smartthings/__init__.py b/homeassistant/components/smartthings/__init__.py
index a4b74d4429a3..49840d0e5a03 100644
--- a/homeassistant/components/smartthings/__init__.py
+++ b/homeassistant/components/smartthings/__init__.py
@@ -199,7 +199,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: SmartThingsConfigEntry)
             entry.data[CONF_LOCATION_ID],
             entry.data[CONF_TOKEN][CONF_INSTALLED_APP_ID],
         )
-    except SmartThingsSinkError as err:
+    except (SmartThingsConnectionError, SmartThingsSinkError) as err:
         _LOGGER.exception("Couldn't create a new subscription")
         raise ConfigEntryNotReady from err
     subscription_id = subscription.subscription_id
diff --git a/tests/components/smartthings/test_init.py b/tests/components/smartthings/test_init.py
index 3daf68fbf97a..cee6ca7a3b12 100644
--- a/tests/components/smartthings/test_init.py
+++ b/tests/components/smartthings/test_init.py
@@ -188,16 +188,24 @@ async def test_create_subscription(
 
 
 @pytest.mark.parametrize("device_fixture", ["da_ac_rac_000001"])
-async def test_create_subscription_sink_error(
+@pytest.mark.parametrize(
+    "error",
+    [
+        SmartThingsSinkError("Sink error"),
+        SmartThingsConnectionError("Timeout occurred while connecting to SmartThings"),
+    ],
+)
+async def test_create_subscription_error(
     hass: HomeAssistant,
     devices: AsyncMock,
     mock_config_entry: MockConfigEntry,
     snapshot: SnapshotAssertion,
+    error: Exception,
 ) -> None:
     """Test handling an error when creating a subscription."""
     assert CONF_SUBSCRIPTION_ID not in mock_config_entry.data
 
-    devices.create_subscription.side_effect = SmartThingsSinkError("Sink error")
+    devices.create_subscription.side_effect = error
 
     await setup_integration(hass, mock_config_entry)