Supreme Court of Canada determines that a person can only be inadmissible to Canada if they are a threat to national security

author avatar
Julia Hornstein
Published: October 1, 2023

On September 27, the Supreme Court of Canada released a very important immigration law decision that limits the power of immigration officials and tribunals to remove foreign nationals with no criminal convictions on security grounds.

Schedule a Free Legal Consultation with the Cohen Immigration Law Firm

The case before the Supreme Court, Mason v Canada (Citizenship and Immigration), concerned Earl Mason and Seifeslam Dleiow, who were both foreign nationals in Canada. Mr. Mason was charged with attempted murder and discharging a firearm following an argument with a man in a bar. The charges were eventually dropped because of delay. In Mr. Dleiow’s case, he was alleged to have engaged in acts of violence against intimate partners. Some of these charges were dropped and he pled guilty to three others.

Following both these incidents, Canada Border Services Agency (CBSA) prepared reports alleging that both men were inadmissible to Canada pursuant to s. 34(1)(e) of the Immigration and Refugee Protection Act (IRPA).

Section 34(1)(e) of the IRPA states that “a permanent resident or a foreign national is inadmissible on security grounds for engaging in acts of violence that would or might endanger the lives or safety of persons in Canada.”

The two men were ultimately found inadmissible to Canada. The inadmissibility tribunal interpreted “acts of violence” under section 34(1)(e) in a broad sense, without requiring there to be a link to national security or the security of Canada. This meant that the violent conduct of both men, even though posing no threat to national security, was still enough to find the men inadmissible to Canada.

The two men disagreed and appealed their decisions, eventually making it all the way to the Supreme Court.

The Supreme Court held that a person can only be found inadmissible to the country under section 34(1)(e) of the IRPA if they engage in violent conduct linked to national security or the security of Canada. Since neither Mr. Mason nor Mr. Dleiow were alleged to have engaged in acts of violence linked to national security or the security of Canada, section 34(1)(e) did not provide a basis for the inadmissibility of either person.

The case provided the Supreme Court of Canada with the opportunity to clarify how expansive Canada’s security inadmissibility provisions are and how they should be interpreted when considering inadmissibility to the country.

According to advocates and legal experts, the decision will restrict authorities and government tribunals from casting the net too widely to capture people they want out of the country, and account for deportation decisions.

Schedule a Free Legal Consultation with the Cohen Immigration Law Firm

Share this article
Share your voice
Did you find this article helpful?
Thank you for your feedback.
Subscribe to our newsletter
Did you find this article helpful?
Please provide a response
Thank you for your helpful feedback
Please contact us if you would like to share additional feedback, have a question, or would like Canadian immigration assistance.
  • Do you need Canadian immigration assistance? Contact the Contact Cohen Immigration Law firm by completing our form
  • Send us your feedback or your non-legal assistance questions by emailing us at media@canadavisa.com
Related articles
Heading to Canada for the holidays? These minor offences can get you turned away at the border
A young woman perched on her luggage, holding a passport and boarding ticket in her hand, with a look of disappointment on her face.
Travelling to Canada for the FIFA World Cup 2026? What you need to know about visas and work permits
A low angle view of a soccer ball in a stadium.
Canada increases immigration fees
A shot of several skyscrapers in Vancouver, with three Canadian flags waving in the wind.
Take these steps if you have a DUI and are planning to visit Canada
An image of the border crossing and line up to immigration check
Top Stories
Canada’s overall foreign worker and student numbers drop for the first time in years
Travelling to Canada in 2026? Plan ahead to avoid being denied entry for a criminal record
British Columbia PNP holds first provincial draw of the year
Join our free newsletter. Get Canada's top immigration stories delivered to your inbox.
Subscribe
More in Provinces
British Columbia PNP holds first provincial draw of the year
Cloud reflections and geese on the water with downtown Vancouver in the background
With the Start-Up Visa Program now closed, what options are entrepreneurs left with?
Woman leaning on desk, looking confident, surrounded by papers and electronics.
The Yukon announces its 2026 nomination allocation, priorities, and intake periods
A shot of Paddy Peak in the Yukon, with mountains and purple flowers visible.
Prince Edward Island publishes its immigration draw schedule for 2026
An aerial photo of the Woods Island Lighthouse on PEI, during a winter sunset.
Link copied to clipboard