Did Barriss Offee Die?

He was eventually killed in a suicidal attack.

Is Barriss Offee returning?

The Illuminerdi has exclusively learned that Star Wars: Ahsoka will include the return of The Clone Wars character Barriss Offee, hopefully finally revealing the former Jedi's fate.

Is Barriss Offee alive canon?

After she admits to her crimes, she is led away from the trial room, and the story goes into what that aftermath looks like for Ahsoka and the Order. Barriss is never seen again. Even though the Expanded Universe of Legends tells her fate, that's not canon.