The former 4th overall pick hasn't played since suffering the injury on Aug. 5 during a seeding game against the Toronto Raptors.
Gordon's scoring dropped for a second straight season. He's averaged 14.4 points, 7.7 boards, and 3.7 assists across 62 appearances in 2019-20.
His decision was also reportedly influenced by the events over the past two days, sources told The Athletic's Shams Charania.
All teams decided to sit out in response to last weekend's police shooting of Jacob Blake in Kenosha, Wisconsin.
The NBA has also postponed Thursday's matchups and hopes to resume the playoffs on either Friday or Saturday.