Markstrom is considered day-to-day with a groin injury, Rick Dhaliwal of TSN 1040 Vancouver reports.
It's safe to assume Markstrom won't dress for Tuesday's Game 5 versus Vegas, but if the Canucks are able to pick up a win and stave off elimination, he could be back for Thursday's Game 6. In the meantime, Thatcher Demko will take over as the Canucks' starting netminder.