Yes, but they will not be the disaster that many are saying they will be.
The reason, first and foremost, is the Canadian and US economy are way too integrated. The supply chains for a whole host of products consumed in the US depend on Canadian inputs to work. If they stop then the manufacturing of many products in the US stops. Perhaps, this convinces those manufacturers to attempt to develop domestic sources for those inputs but that will cost billions of dollars, which these companies will not want to spend. In the end they will probably continue to buy the Canadian inputs and wait for Donald Trump to be distracted by the next shiny thing, while heavily lobbying Donald Trump's people to convince him that he should ease off. In the meantime they will just pass the cost of the tariffs off on their customers, who will not have any other alternative.
The second reason is once the tariffs are imposed any domestic US producers will raise their prices to match the new tariff prices for their competitors, minus one percent. So, there would be a 25% tariff on Canadian softwood, then American softwood producers will raise their prices by 24%. In short, the price differential between the tariffed goods and the non-tariffed goods will not be as big as everybody thinks. The tariffs will provide an opportunity of a financial windfall for domestic producers in the US and you do not understand capitalism very well if you believe they will not take full advantage of that.
This applies for all sorts of industries, steel, petroleum products, fertilizer, you name it.
Third, the currency markets will react like all currency markets to the tariffs and push the exchange rate of the Canadian dollar down relative to the US dollar. That will make Canadian products cheaper, despite the tariffs, and further reduce the differential between tariffed goods and non-tariffed goods.
Fourth, Donald Trump will probably not stop at Canada, Mexico and China. I would bet a fair amount of money that Donald Trump will target the European Union before the end of 2025. A funny thing happened during the first Trump term, when he decided to impose tariffs on the US's biggest allies and trading partners. Trade flows increase between the trading partners and decreased with the US. The Canadian government has been working diligently to encourage Canadian producers to diversify where they sell their products and they have responded. While the US is still our biggest trading partner, the volume of trade with the US has actually fallen in the last few years while trading volumes with other markets has increased. Expect more of the same as more of the Western world turns away from an increasingly unpredictable US market to trade with other more stable western economies. Plus, the Trudeau government has been pushing trade in the non-China parts of Asia with some success.
The Trump tariffs, if he actually follows through on them, will create some hardship in Canada in the short-term. However, the actions of domestic US producers to take advantage of the tariffs, the currency markets devaluing the Canadian dollar and increase trade diversification will lead to a new equilibrium in the medium-term, again assuming that he follows through on them and maintains them for more than a few months.