You can delete contacts and groups at any time.
Select one or more contacts or a group.
Press the Delete key.
You can’t delete contacts in read-only accounts, such as Facebook and LinkedIn. If you edit contact information in a read-only account, the changes appear only in Contacts. If you remove the account, any edited contacts remain in your default contact account.
If you include a group in a condition (by choosing “Card is member of” or “Card is not member of”), you can’t delete that group until you change the condition or delete the Smart Group.