Contacts in group that don’t belong there
I created a group of people that I belong to and when I select that group people that don’t belong in that group show up. What do I have to do to correct that?
iPhone 7 Plus, iOS 13
Add or remove someone from a group conversation
Anyone in a group iMessage can add or remove someone from the conversation. You can remove a person from a group iMessage that has at least three other people. You can’t add or remove people from group MMS messages or group SMS messages.
If you are referring to groups under Contacts then you probably are using a third party app. Contact the app developer please.