[maram]

>>If Leave this Conversation is grayed out on your iPhone, there are only three participants in the iMessage conversation, and you can’t convert a three-person iMessage conversation to an iMessage between two people. >> Even if you delete the entire conversation from your iPhone, you will be added back to the group the next time someone sends a message. The only way to leave a three-person iMessage conversation is to add someone else to the group so it becomes a four-person conversation: Then you can leave.

[programmarchy]

Then is the person you added trapped in the conversation after you leave?

[AnnoyedComment]

Da Ringu (The Ring). Rich joke area.

[stkdump]

Whatsapp does allow it and this nicely allows anyone to create a small personal note taking area: just create a group chat with anyone else and then ask that person to leave again.

[jobigoud]

Signal just lets you create a convo with yourself.

[dottenad]

You also cannot leave a party of 4+ if one of the people are not on iPhone.

[nielsbot]

Because it’s no longer iMessage, but SMS. The other phones are sending to everyone they think is in the “room”. So you’ll be re-added. You’ll just have to tell them to stop texting you.