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Steven Guilbeault makes his way to a Liberal Party of Canada caucus meeting on Parliament Hill in Ottawa on May 27.Spencer Colby/The Canadian Press

Three federal by-elections will end today with a promise of more to come, now that Prime Minister Mark Carney has to schedule another six of them.

Liberal MP Steven Guilbeault officially resigned his Montreal seat of Laurier–Sainte-Marie on Friday, according to the House of Commons website.

Guilbeault has said he’s leaving government on a matter of principal because the party’s direction on energy and the environment changed under Carney’s leadership.

Guilbeault plans to exit politics, pursue climate fight in ‘different way’

Conservative MP Cathay Wagantall is also expected to officially resign today, something she announced in June.

This year has seen a revolving door of MPs leaving the Commons as many elected officials looked for opportunities elsewhere.

The prime minister must call a by-election within 11 to 180 days after a seat becomes vacant.