"Should restrictions be imposed on Canadian steel and aluminum products, Canada will take appropriate, responsive measures to defend our trade interests and our workers," Freeland told a press conference.
Earlier US President Donald Trump said he would not back down on the tariffs, nor offer exclusions to North American Free Trade Agreement (NAFTA) partners Canada and Mexico unless he gets a "fair" deal in the current negotiations to revamp the 1994 trade agreement.
Canada, which has the most to lose as the top source of US steel to the US market, has called the tariffs "unacceptable." Mexico's Economy Minister Ildefonso Guajardo in a tweet said the threat is "the wrong way to incentivize the creation of a new & modern NAFTA."
The European Commission is drafting a list of products upon which it could impose heavy taxes to send "a political message" to Donald Trump if the US president follows through on plans to impose tariffs on steel and aluminum, a European source said Friday.