**To remove a source identifier from a subscription** This example removes a source identifier from an existing subscription:: aws rds remove-source-identifier-from-subscription \ --subscription-name my-instance-events \ --source-identifier test-instance-repl Output:: { "EventSubscription": { "EventSubscriptionArn": "arn:aws:rds:us-east-1:123456789012:es:my-instance-events", "SubscriptionCreationTime": "Tue Jul 31 23:22:01 UTC 2018", "EventCategoriesList": [ "backup", "recovery" ], "SnsTopicArn": "arn:aws:sns:us-east-1:123456789012:interesting-events", "Status": "modifying", "CustSubscriptionId": "my-instance-events", "CustomerAwsId": "123456789012", "SourceIdsList": [ "test-instance" ], "SourceType": "db-instance", "Enabled": false } }