As of September 7, 2021, if you received a full series of COVID-19 vaccinations accepted by the Government of Canada, you can now travel to Canada as a visitor for non-essential reasons, like for a study abroad program of six months or less, as long as all other requirements are met. There are limited reasons someone could still travel to Canada unvaccinated. If you are going to be studying at Waterloo for two terms or more, than a letter of introduction that shows approval of a study permit is required to enter Canada.
If you are not a citizen of the United States, you'll also need either a Temporary Resident Visa (TRV) or an Electronic Travel Authorization (eTA) to enter Canada depending on your country of citizenship. If you are applying for a study permit, this entry document would be issued to you with a study permit approval.
As a study abroad student, you can work on campus (no limitations on hours per week) if you have a valid study permit with work eligibility stated on it and you’re registered in a full-time course load. You are not permitted to work off campus. If you are going to study at Waterloo for only one term, you still need to apply for a study permit if you would like to work on campus while studying. In your study permit application, it's important that you include a letter of explanation to clarify why you are applying for a study permit for one term of study. If you receive approval for a study permit, and wish to work on campus during your studies, you need to verify that the study permit has the R186(f) work condition for campus work stated on it when it is issued to you at the airport.
Please review the FAQs on Waterloo's COVID-19 Information website to ensure you're eligible to enter Canada based on the most up-to-date travel restrictions and check out the immigration applications webpage for additional resources. Contact one of University of Waterloo's immigration consultants for free if you have questions.