Marquis left camp on Thursday, and the club still isn't sure when he'll be back. He threw a bullpen back home on Saturday.
"It will be a few more days before he can free himself up, which is the right thing," Twins general manager Terry Ryan said.
Second baseman Alexi Casilla also missed his third straight game, as his wife, Dalkis, has been in the hospital with back problems. Casilla, though, is expected to be back in the lineup on Sunday against the Cardinals.