In another explicit display of the country's displeasure with Canada, Saudi Arabia's state airline has suspended all flights to and from Toronto.
Saudi Arabia's diplomatic spat with Canada prompted a tweet that touched a raw nerve in the kingdom: a photomontage of an Air Canada plane heading toward the iconic CN Tower in Toronto.
Transport Canada did not immediately respond to request for comment on the development.
Since Monday social media has been saturated by the surprising news that Saudi Arabia made a decision to expel the Canadian ambassador, along with freezing trade and investment ties with Canada.
Dan McTeague, a senior analyst at the fuel price tracking website GasBuddy, said any such disruption could easily be offset by alternative supply, as Saudi Arabia's oil continues to represent an increasingly small portion of Canada's crude imports. Canadian exports to Saudi Arabia totaled about $1.12 billion in 2017, or 0.2 percent of the total value of Canadian exports.
In response, Canada's foreign affairs minister Chrystia Freeland said the government will not back down.
Samar's brother, blogger Raif Badawi, was arrested in 2012 and sentenced to 1,000 lashes and 10 years in jail for "insulting Islam" in a case that sparked an global outcry.
In recent months Saudi Arabia has lifted a ban on women driving, but it has also arrested activists, including more than a dozen high-profile campaigners for women's rights.
Crown Prince Mohammed, as heir to the throne, is in line to become the first Saudi king from a new generation after a succession of six brothers dating to 1953.
The Saudi Foreign Ministry took exception to the wording of the tweet, calling it an attempt by Canada to interfere with the country's internal affairs. "Canada stands together with the Badawi family in this hard time, and we continue to strongly call for the release of both Raif and Samar Badawi".
Amnesty International has said Badawi, the sister of jailed blogger Raif Badawi, was recently detained along with Nassima al-Sada, another prominent female activist.
When asked about the contract, Freeland said the government "looks forward" to hearing from Riyadh about the future of the deal.
"So neither Saudi nor Canada are going to be affected much by stopping the wheat and barley trade".
Amnesty International said the response to Canada showed that it was important Western countries not be intimidated into silence over Riyadh's treatment of dissenters.