The new restrictions are part of the effort to prevent more infectious COVID-19 variants from spreading.
For weeks, Prime Minister Justin Trudeau has been warning Canadians they could be stuck outside the country at any time, and has urged people to cancel any non-essential trips.
Among the measures likely to be announced is a requirement that anyone returning from abroad must quarantine for two weeks in a hotel, at their own expense.
Police Looking for Missing Woman
They say Marni Parliament last seen at her home in Niagara Falls
Man Killed in Wainfleet Crash
Police say he was thrown from the pickup truck as it rolled into the ditch
Police Arrest Another Assault Suspect
They're still looking for 3 more men, after assault in St. Catharines
‘Please disregard the content of that email’: Tim Hortons mistakenly awards hundreds of grand prizes
Picture of Assault Suspect Released
Police also looking for 3 others after man left with life threatening injuries
Premier Fumes Over Gas Price Increase
Doug Ford pointed out there's been no change in places like Chicago or Minnesota
Niagara Falls Man Charged with Fraud
Police say it was concerning construction jobs that didn't get done, after payment
Arrests Made in Armed Residential Robbery
Two men face a number of charges each after the robbery in Niagara Falls