Head coach Kyle Shanahan and players strongly condemned Campbell after a 12-6 loss to the Rams on Thursday night during which Campbell refused to enter the game as a backup. On Friday, Shanahan made it clear that Campbell had played his last snap for the 49ers.

“You guys heard from me last night, you guys heard from our players,” Shanahan said. “His actions from the game, it’s not something you can do to your team or your teammates and still expect to be a part of our team.”

Campbell started 12 of the first 13 games and played 90% of the snaps before Thursday, when linebacker Dre Greenlaw made his season debut after suffering a torn Achilles in February.

Campbell had expressed his displeasure to the Chronicle in September after linebacker Dee Winters briefly replaced him in a loss to the Rams in Week 3, suggesting a timeshare at the position would be an issue if it continued.

“I’m not going to make a big deal about it right now,” Campbell said. “We’ll see what happens.”

Campbell has previously had a messy divorce from an employer. Last December, he said on social media that he wasn’t “playing through injuries anymore cause when s— goes wrong they always use it against you.” After he was released in March, Campbell criticized the Packers’ coaching staff for how they deployed him.

Campbell told the Chronicle in July that he had no regrets about how he left the Packers.

“I don’t regret anything I do or say,” Campbell said. “I don’t have any ill will for anybody. I just felt like some things could have gone a little bit differently. That’s the business part of it. I respect it either way. That’s just part of being a man and part of being a professional. You just have to take things as they come.”

Campbell's suspension means he will not be compensated for the final three weeks and raises the possibility the team could seek to recoup some of his $3.35 million signing bonus.