Thompson, who played 20 games for the Crows since being drafted in 2010, and rookies Alex Spina and James Battersby were told on Friday they wouldn't be offered new contracts by the club.
Spina and Battersby didn't play an AFL game.
The changes mean the Crows have made nine changes to their playing list since missing this year's finals.
Stalwarts Ben Rutten and Jason Porplyzia retired, while Jared Petrenko, Shaun McKernan, Angus Graham and Lewis Johnston were other delistings.
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