Later, airline Saudia suspended all flights to and from Toronto and Riyadh said it will relocate the thousands of Saudi students studying in Canada.
Officials said they would cover cancellation fees, issue refunds and find alternative flights for stranded travellers, according to a story on the CBC National website.
Saudi Arabia's actions followed criticism from Canadian Foreign Minister Chrystia Freeland and other diplomats who denounced the conservative kingdom for its recent arrest of women's rights activists.
Saudi Arabia's decision to order students to leave Canada is expected to impact schools across the country, including the University of Victoria.
Canada's remarks are "an affront to the kingdom that requires a sharp response to prevent any party from attempting to meddle with Saudi sovereignty", the Ministry said in the news release.
Saudi Arabia's main state wheat buying agency has told grains exporters it will no longer buy Canadian wheat and barley in its global tenders, European traders said on Tuesday, as a diplomatic dispute between the two countries escalates.
Freeland said Canadians "expect" its foreign policy to be driven by Canadian values.
European traders said on Tuesday that Saudi Arabia's main wheat-buying agency has told grains exporters it will no longer accept Canadian-origin wheat and barley.
Momani called it, "getting tough on Canada", which she said other countries in the region might welcome if they view Canadian foreign policy to be led by human rights concerns.
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One major hurdle to the proposal is that North Korea has not even disclosed how many nuclear bombs it actually has. But Trump has already given Kim some concessions, including ending joint military drills with South Korea.
Roughly 10 per cent of the barley Canada exports is sent to Saudi Arabia.
Canada's previous Conservative government, which lost power to the Liberals in 2015, also had challenges with Riyadh over human rights.
'Canada will always stand up for human rights, in Canada and around the world, and women's rights are human rights, ' Freeland told an audience in Vancouver.
The photo was posted after tensions between Saudi Arabia and Canada erupted this week over the the Trudeau government's call to release jailed Saudi women's rights activists.
Saudi Arabia expelled the Canadian ambassador, recalled its ambassador to Canada, and put trade deals between the two countries on ice. His wife, Ensaf Haidar, lives in Canada and received Canadian citizenship in July.
"We do believe that this is because of continuous pressure and visibility on Raif's case so we're really hoping that more states speak out on Samar Badawi and all other activists". Canada's ambassador, Dennis Horak, is not in Riyadh.
There's a lot of uncertainty for Saudi Arabian students after their country made a decision to suspend government scholarships for studying in Canada.
"It is a significant portion of our barley exports", Dahl said, noting the market had been considered a stable market, noting the industry saw growth potential there given ongoing food sustainability concerns within Saudi Arabia.
Neighbours and allies Bahrain and the United Arab Emirates said they stood with Riyadh, although they did not announce similar measures.