Elections Newfoundland and Labrador says byelections will take place on Nov. 25 in Trinity-Bay de Verde and Humber East.
Those two ridings became vacant after the resignations of former cabinet ministers Charlene Johnson and Tom Marshall.
Marshall also served as premier this year before Paul Davis took on the role after he became the leader of the Progressive Conservatives at a convention in September.
There is also a byelection Wednesday in the riding of Conception Bay South, which was called after Terry French, who served as justice minister, stepped down from politics.
Aside from the three vacant seats, there are 29 Progressive Conservative members, 13 Liberals and three NDP members.