Upvote:4
This CIC webpage clearly indicates the conditions of re-entry in Canada for international students
If you leave Canada and want to return, you must have:
- a valid passport or travel document;
- a valid study permit if you are returning to study in Canada;
- a valid visitor visa, if you are a citizen of a visa-required country. You must - re-apply for a temporary resident visa (visitor visa) if:
- your visa has expired; or
- your visa was only valid for a single entry to Canada.
- an Electronic Travel Authorization (eTA) by March 15, 2016 if you are from an eTA-required country and received your student permit before August 1, 2015 and you plan to travel from and return to Canada by air. Note: Students who get their study or work permit on or after August 1, 2015 will automatically be issued an eTA along with their permit.
Having received my study permit before August 1, 2015, I will have to apply for an eTA. Here is the link to apply
Thank you to @mkennedy for the link.