He'll miss the two games against Lithuania and Liechtenstein and he's joined on the injured list by former Burnley striker Steven Fletcher. He's also ruled out of the first game but Levein his hopeful he'll be able to join up with the squad for the second of the two games, against Liectenstein next Tuesday at Hampden Park.
Iwelumo recently won his third cap, coming on as a substitute against Sweden in a friendly international earlier this month, and in doing so became the seventh Burnley player to represent Scotland.
It now appears a race against time to get him fit for Burnley's next game, the local derby against Preston in twelve days time.