Is Kingdom Hearts 3 out yet?

Not yet. There is

Kingdom Hearts (PS2)

Kingdom Hearts Chain of Memories (GBA)

Kingdom Hearts 2 (PS2)

Kingdom Hearts Re: Chain of Memories (PS2)

358/2 Days (DS)

There Will Be Kingdom Heart 3 Out In 2010. I Heard MAny People Saying It Might Be Out On The Wii But It Not Official.