OTTAWA—Canada said Tuesday China has banned imports from a Canadian pork company, weeks after Canadian officials warned the meat industry of heightened Chinese scrutiny of its products amid a broader diplomatic row between Ottawa and Beijing.

A spokeswoman for Canada’s Agriculture Minister, Marie-Claude Bibeau, said Canadian diplomats in Beijing were informed last week of the temporary suspension of pork imports from a Quebec processor, Frigo Royal. Customs agents in China are said to have found traces of a feed additive,...