diff --git a/homeassistant/components/smartthings/const.py b/homeassistant/components/smartthings/const.py
index 9d779bf9d5b..03188411f07 100644
--- a/homeassistant/components/smartthings/const.py
+++ b/homeassistant/components/smartthings/const.py
@@ -24,6 +24,8 @@ SIGNAL_SMARTAPP_PREFIX = "smartthings_smartap_"
 
 SETTINGS_INSTANCE_ID = "hassInstanceId"
 
+SUBSCRIPTION_WARNING_LIMIT = 40
+
 STORAGE_KEY = DOMAIN
 STORAGE_VERSION = 1
 
@@ -41,6 +43,12 @@ SUPPORTED_PLATFORMS = [
     "scene",
 ]
 
+IGNORED_CAPABILITIES = [
+    "execute",
+    "healthCheck",
+    "ocf",
+]
+
 TOKEN_REFRESH_INTERVAL = timedelta(days=14)
 
 VAL_UID = "^(?:([0-9a-fA-F]{32})|([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}))$"
diff --git a/homeassistant/components/smartthings/smartapp.py b/homeassistant/components/smartthings/smartapp.py
index 918ee455c27..24d6e4ae18f 100644
--- a/homeassistant/components/smartthings/smartapp.py
+++ b/homeassistant/components/smartthings/smartapp.py
@@ -44,10 +44,12 @@ from .const import (
     DATA_BROKERS,
     DATA_MANAGER,
     DOMAIN,
+    IGNORED_CAPABILITIES,
     SETTINGS_INSTANCE_ID,
     SIGNAL_SMARTAPP_PREFIX,
     STORAGE_KEY,
     STORAGE_VERSION,
+    SUBSCRIPTION_WARNING_LIMIT,
 )
 
 _LOGGER = logging.getLogger(__name__)
@@ -355,7 +357,26 @@ async def smartapp_sync_subscriptions(
     capabilities = set()
     for device in devices:
         capabilities.update(device.capabilities)
+    # Remove items not defined in the library
     capabilities.intersection_update(CAPABILITIES)
+    # Remove unused capabilities
+    capabilities.difference_update(IGNORED_CAPABILITIES)
+    capability_count = len(capabilities)
+    if capability_count > SUBSCRIPTION_WARNING_LIMIT:
+        _LOGGER.warning(
+            "Some device attributes may not receive push updates and there may be subscription "
+            "creation failures under app '%s' because %s subscriptions are required but "
+            "there is a limit of %s per app",
+            installed_app_id,
+            capability_count,
+            SUBSCRIPTION_WARNING_LIMIT,
+        )
+    _LOGGER.debug(
+        "Synchronizing subscriptions for %s capabilities under app '%s': %s",
+        capability_count,
+        installed_app_id,
+        capabilities,
+    )
 
     # Get current subscriptions and find differences
     subscriptions = await api.subscriptions(installed_app_id)
diff --git a/tests/components/smartthings/test_smartapp.py b/tests/components/smartthings/test_smartapp.py
index 458e5f8ce27..42215def82f 100644
--- a/tests/components/smartthings/test_smartapp.py
+++ b/tests/components/smartthings/test_smartapp.py
@@ -1,7 +1,7 @@
 """Tests for the smartapp module."""
 from uuid import uuid4
 
-from pysmartthings import AppEntity, Capability
+from pysmartthings import CAPABILITIES, AppEntity, Capability
 
 from homeassistant.components.smartthings import smartapp
 from homeassistant.components.smartthings.const import (
@@ -89,7 +89,7 @@ async def test_smartapp_webhook(hass):
 async def test_smartapp_sync_subscriptions(
     hass, smartthings_mock, device_factory, subscription_factory
 ):
-    """Test synchronization adds and removes."""
+    """Test synchronization adds and removes and ignores unused."""
     smartthings_mock.subscriptions.return_value = [
         subscription_factory(Capability.thermostat),
         subscription_factory(Capability.switch),
@@ -98,7 +98,7 @@ async def test_smartapp_sync_subscriptions(
     devices = [
         device_factory("", [Capability.battery, "ping"]),
         device_factory("", [Capability.switch, Capability.switch_level]),
-        device_factory("", [Capability.switch]),
+        device_factory("", [Capability.switch, Capability.execute]),
     ]
 
     await smartapp.smartapp_sync_subscriptions(
@@ -134,6 +134,25 @@ async def test_smartapp_sync_subscriptions_up_to_date(
     assert smartthings_mock.create_subscription.call_count == 0
 
 
+async def test_smartapp_sync_subscriptions_limit_warning(
+    hass, smartthings_mock, device_factory, subscription_factory, caplog
+):
+    """Test synchronization over the limit logs a warning."""
+    smartthings_mock.subscriptions.return_value = []
+    devices = [
+        device_factory("", CAPABILITIES),
+    ]
+
+    await smartapp.smartapp_sync_subscriptions(
+        hass, str(uuid4()), str(uuid4()), str(uuid4()), devices
+    )
+
+    assert (
+        "Some device attributes may not receive push updates and there may be "
+        "subscription creation failures" in caplog.text
+    )
+
+
 async def test_smartapp_sync_subscriptions_handles_exceptions(
     hass, smartthings_mock, device_factory, subscription_factory
 ):