No. In any case, a temporary resident visa (for visits, work or study) cannot be issued to a visa-exempt national. If they come to Canada by air, an electronic travel authorization is required (other than for a U.S. citizen or Lawful Permanent Resident).
Usually, the only issue, assuming standard admissibility requirements are met, is whether a work or study permit is required.
Foreign business visitors, including those who attend conferences, do not require a work permit, if the following is met
To qualify as a business visitor to Canada, you must show that
- you plan to stay for less than 6 months
- you don’t plan to enter the Canadian labour market
- your main place of business, and source of income and profits is outside Canada
- you have documents that support your application
- you meet Canada’s basic entry requirements, because you
- have a valid travel document, such as a passport
- have enough money for your stay and to return home
- plan to leave Canada at the end of your visit
- are not a criminal, security or health risk to Canadians