McCollum left the Blazers' 112-106 victory over the Atlanta Hawks on Saturday at halftime because of the injury. Stotts said after the game that X-rays ruled out a more serious injury.
McCollum had 16 points in the first half. It was unclear when he was hurt, but it appeared that the Hawks' Clint Capela stepped on his foot following a layup in the opening quarter.
Rodney Hood started in McCollum's absence in Monday's 125-104 victory over the San Antonio Spurs and scored a season-high 21 points. It was his first start since suffering a torn Achilles on Dec. 6, 2019.
McCollum is averaging a career-best 26.7 points and 5.0 assists in 13 games this season.
The Associated Press contributed to this report.