Trudeau has said such measures could be imposed suddenly and bluntly warned against nonessential trips abroad.
A second official said the reason for new measures is concern over new variants of the virus and said they are designed to discourage travel, especially to sunny destinations during March break. The official also spoke on condition of anonymity for lack of authorisation to speak ahead of the announcement.
Canada already requires those entering the country to self-isolate for 14 days and to present a negative Covid-19 test taken within three days before arrival. The suggested measure would require isolating at a hotel rather than at home.