NHL players entering Canada would be subject to quarantine as the league looks to restart the coronavirus-hit season, said prime minister Justin Trudeau.
The 2019-20 NHL campaign was suspended on March 12 and it remains to be seen when, and if, the season will resume.
There were 189 regular-season games remaining when the league came to a halt because of COVID-19, which has killed more than 248,000 people globally.
As the NHL considers ways to resume, Trudeau is sceptical about ice hockey, with borders closed due to the pandemic.
"I think it's a question we'll have to look into,'' Trudeau said on Sunday.
"Certainly at a strict minimum, anyone who arrives from another country will have to follow all the rules of quarantine in an extremely strict manner, but we're not there yet in our discussions with the NHL.
"We recognise that it's a possibility, but it depends on an enormous amount of things, and I don't want to speculate on this until there's more discussion."