Cousins, who's officially listed as questionable for Monday's tilt against the San Antonio Spurs, left Saturday's game against the Oklahoma City Thunder early in the fourth quarter, with the team citing a sore right ankle.
After being called for a foul in the fourth, Cousins looked to be in discomfort before leaving the game with seven minutes remaining.
Cousins missed the first three months of the season while recovering from a torn left Achilles tendon. In 21 games with the Warriors, the 28-year-old is averaging 15.6 points, 7.9 rebounds, and 3.6 assists.
Veteran center Andrew Bogut, who signed with Golden State earlier this month, will join the team against the Spurs.