The shooting prompted widespread discussion of Islamophobia, racism, and right-wing terrorism in Canada. The decision was upheld on May 27, 2022, meaning Bissonnette will be eligible for parole in 2042. Quebec prosecutors sought to reinstate the original sentence with an appeal to the Supreme Court of Canada. Upon appeal, the Court of Appeal of Quebec found 40 years without parole to be unconstitutionally cruel and unusual punishment, adjusting the sentence to life in prison with no possibility of parole for 25 years.

On February 8, 2019, Bissonnette was sentenced to life in prison, with no possibility of parole for 40 years.

The perpetrator, 27-year-old Alexandre Bissonnette, pleaded guilty to six counts of first-degree murder and five counts of attempted murder. Approximately 40 people were reported present at the time of the shooting. Six worshippers were killed and five others seriously injured after evening prayers when the gunman entered the prayer hall shortly before 8:00 pm and opened fire for about two minutes with a 9mm Glock pistol. The Quebec City mosque shooting ( French: Attentat de la grande mosquée de Québec) was an attack by a single gunman on the evening of January 29, 2017, at the Islamic Cultural Centre of Quebec City, a mosque in the Sainte-Foy neighbourhood of Quebec City, Canada.