In line with a campaign pledge, the newly-elected Trudeau has vowed to bring home Canadian warplanes deployed in Iraq and Syria, without setting a specific timeframe.
"We will continue to do more than our share, including a military engagement, but especially in training rather than air strikes," he told Canadian media travelling with him to an Asia-Pacific summit in Manila.
"I've committed repeatedly to my allies that we were going to do more on the training front and that means obviously more than just 69 trainers" currently on the ground in northern Iraq.
"There is no question that this is not going be a short engagement," Trudeau added.
Trudeau is expected to meet with US President Barack Obama on the sidelines of the two-day Asia-Pacific Economic Co-operation summit starting tomorrow.
He said he would tell him that "Canada continues to stand firm in its commitment to the coalition along with 60 other countries."
Parliament in March voted to extend the mission one year, but Trudeau has vowed to cut it short.
