Hey, This is due to members that never migrated form Battle.net to Steam, it puts them in sort of a limbo where that are and aren't in the clan. You will need to have a dummy account join the clan then you can make it leader then you can leave, dissolving the clan is also impossible due to those members still being in the clan. Unfortunately those account will be stuck in the clan forever.

[quote]Hello, I cant leave my clan. i tried leaving it in-game and also in the companion app. in the companion app all members have been kicked out and i tried to click the leave clan and disband button. It doesnt do anything. later on i checked in-game and it still showed 3 members. i cant see them in the roster so i cant kick them out to leave it. those 2 methods didnt work for me. Please help! Thanksssss[/quote] Why what's up