How to delete a AWS RDS instance?

To delete a DB instance, you must do the following:

• Provide the name of the instance
• Enable or disable the option to take a final DB snapshot of the instance
• Enable or disable the option to retain automated backups

To restore a DB instancefrom a DB snapshot

1. To delete a DB instance
2. Sign in to the AWS Management Console and open the Amazon RDS console at https://console.aws.amazon.com/rds/.
3. In the navigation pane, choose Databases, and then choose the DB instance that you want to delete.
4. For Actions, choose Delete.

5. To create a final DB snapshot for the DB instance, choose Create final snapshot?.

6. To retain automated backups, choose Retain automated backups.

7. Enter delete me in the box.

8. Choose Delete.

Reference: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_DeleteInstance.html