On Monday, the USA announced a 30-day agreement with both Canada and Mexico that includes immediately returning any illegal migrants to the countries from which they arrived, or to their countries of origin if that isn't possible, rather than holding them at facilities in the U.S.
She noted at a news conference that Washington had yet to make a decision, but added, "We do not believe at all that there would be a public health justification for (the US) to take this action".
The troop deployments come on the heels of the Trump administration's announcement last week suspending nonessential travel between USA and Mexico.
The Bank of Canada has made two emergency cuts to its key lending rate to help insulate the economy as business activity slows. It is an image Canadians should get used to.
The government is also looking at extending lower-interest credit directly to consumers, Prime Minister Justin Trudeau said, in his daily update to Canadians on Thursday.
Further, Freeland said, the US has been told that stationing troops on the world's longest undefended border might not be "the right way to treat a trusted friend and military ally". "Canada is strongly opposed to this USA proposal".
"I want to remind everyone that the government's website is the best place to find reliable information on everything we're doing", Trudeau said.
Freeland said the move would be unjustified, as very few people cross illegally into the US from the Canadian side.
Canada has already closed the border to non-essential travel from the United States as part of a bid to combat coronavirus.
Canada has told the Trump administration that a proposal to put troops at the U.S.
A USA official said the proposed deployment would help border patrol officers enforce the ban on non-essential travel by providing communications and monitoring capabilities.
Morneau said more than 2,000 Canada Revenue Agency workers are being redeployed to help get the employment benefits flowing.
Trudeau also says it's vital to protect our supply chains to keep essential products like food flowing.
He said it would be "equal justice" since US military have deployed to play a support role on the border with Mexico. -Canada border has always been a point of pride.
"Any unknown or unresolved illegal entries into the United States in between ports of entry have the potential to spread infectious disease", reads the memo, sent March 19 from Juliana Blackwell, Homeland Security's executive secretary, to her counterpart at the Pentagon, Captain Oliver Lewis.