The San Francisco 49ers have suspended linebacker De’Vondre Campbell for three games for refusing to play against the Los Angeles Rams on Thursday night, the team announced Monday.

General manager John Lynch, who announced the suspension in a statement, said the 49ers would “have no further comment on this matter.”

The suspension for conduct detrimental to the team will likely end Campbell’s season. The 49ers (6-8) are still mathematically alive for the postseason, but trail four other teams for the seventh and final NFC playoff spot.

Campbell’s decision not to play in the Niners’ 12-6 loss angered coach Kyle Shanahan and many of his teammates.

“This is not something you can do to your team or your teammates and still be part of our team,” Shanahan said Friday.

The team had the option of cutting the 31-year-old Campbell, which would have allowed him to clear waivers and potentially sign with a team to play the remainder of the season. But a suspension would potentially allow the Niners to recoup some of the $3.35 million signing bonus they gave Campbell when he signed a one-year, $5 million deal in March.

He received the deal after another veteran linebacker, Eric Kendricks, agreed to sign with San Francisco before backing out to join the Dallas Cowboys. Campbell was slated to be a placeholder for Dre Greenlaw, the team’s starting weakside linebacker, who was recovering from a torn Achilles tendon in Super Bowl LVIII.

While Greenlaw was still recovering through the first 13 weeks, Campbell started 12 games and played 90% of the defensive snaps with 79 tackles, including three for loss, and two passes defended.

Greenlaw’s return Thursday night provided an immediate spark for the Niners’ defense, which held the Rams without a first down in the first quarter and to just three points in the first half. But Greenlaw began dealing with knee soreness in the third quarter when the Niners asked Campbell to come into the game.

According to Shanahan, Campbell was actually asked to come into the game in the second quarter when strongside linebacker Dee Winters left with a neck injury. Demetrius Flannigan-Fowles had to step in for Winters after Campbell told the coaching staff he didn’t want to play. In the fourth quarter, he went to the locker room – a move Shanahan said the linebacker made on his own.

Campbell will be an unrestricted free agent after the season.

ESPN’s Nick Wagoner contributed to this report.