A report from the United Nation's Office of the High Commissioner on Human Rights calls the crackdown "systematic" and "very likely" including crimes against humanity, branding the government's work as "ethnic cleansing".
He directed the blame toward Myanmar's powerful military, which is responsible for security operations that have seen almost 400,000 people flee to neighbouring Bangladesh in the past three weeks after Rohingya insurgents launched coordinated attacks on government forces.
On Monday, British Foreign Minister Boris Johnson was due to chair a ministerial meeting to discuss ways to resolve the Rohingya crisis, with the meeting expected to be attended by representatives of countries including the United States and Australia.
Myanmar government leader and Nobel laureate Aung San Suu Kyi has faced a barrage of criticism from overseas for not stopping the violence and for her silence on the outrage.
Police were checking vehicles near the border in an effort to exert control as the exodus of refugees fleeing violence and persecution continued.
And this is going to, in many ways, I think, define the direction that Burma will take. They are sick. I can't give them any medicine.
The entire Muslim world should strongly protest the violence.
In Dakar on Friday, the protesters from various religious organisations carried banners in solidarity with the Rohingya people as they marched from the central mosque in Dakar to the Obelisk Square.
Freeland also told the rally that she also discussed the issue with Kofi Annan, the former UN Secretary-General who is now leading a commission investigating the crisis unfolding in Myanmar.
She did not elaborate on the specific actions she or Trudeau plan to take.
"The humanitarian situation is catastrophic", he said, noting that at the time of his briefing to the press last week, there were 125,000 Rohingya who had fled to Bangladesh.
The Rohingya have been denied citizenship in Myanmar since 1982, which has effectively rendered them stateless.
Amnesty International said Thursday it has evidence of an "orchestrated campaign of systematic burnings" by Myanmar security forces targeting dozens of Rohingya villages over the last three weeks.
The government leader Aung San Suu Kyi has faced a lot of criticism for not speaking against the violence.