Adelaide delists restricted free agent Brodie Martin along with rookies Anthony Wilson and Jack Osborn.
"I'd like to thank Brodie, Sam, Anthony and Jack for their contributions," Crows head of football David Noble said.
"It's a difficult time of year, saying goodbye to quality young men who have been part of our club for a period of time, and in Brodie's case the past eight years.
"We wish all of the boys the very best for the future."