The Northants batsman missed the Scots' win over United Arab Emirates at the weekend and is not expected to return to the crease tomorrow against Canada in the final Group A match. Coetzer might also fail to recover in time for the Super Six stage.
He underwent a scan in Christchurch yesterday and Craig Wright, Scotland's interim joint coach, is preparing to be without his captain for some time. "It's unlikely Kyle will be fit for the next match," he said. "We'll have to wait and see."
Coetzer first sustained the injury while playing for Northants in T20 Finals Day in August and his absence is expected to provide another opportunity for Matty Cross to open the batting. He scoring 88 runs against UAE on Sunday.
That match ended in victory but also cost the Scots a portion of their match fees after referee Dev Govindjee ruled that they did not bowl their overs in the allotted time. Preston Mommsen, interim captain, was fined 40% of his fee and his team-mates 20%.