OTTAWA—Prime Minister Justin Trudeau says “rare exceptions” to new travel restrictions will be made on compassionate grounds, but that more contagious COVID-19 variants now taking hold in Canada mean tough rules must be implemented in the next few weeks. “Since the beginning of this pandemic there have been stories of funerals that haven’t been able to be held, weddings had to (be) put off or done by Zoom, families not being able to get together,” Trudeau said at a press conference Tuesday. “But at the same time our responsibility is to make sure we’re keeping Canadians as safe as possible. These new variants out there are of real concern,” he said, acknowledging exceptions for “compassionate or humanitarian” reasons. Trudeau announced last week that passengers returning from abroad will have to quarantine at hotels for up to three days after taking PCR tests upon arrival, but no date has been set …