you can apply non resident if you cut the residential ties.
Residential ties include:
a home in Canada;
a spouse or common-law partner (see the definition in the General Income Tax and Benefit Guide) or dependants in Canada;
personal property in Canada, such as a car or furniture;
social ties in Canada.
Other ties that may be relevant include:
a Canadian driver's licence;
Canadian bank accounts or credit cards;
health insurance with a Canadian province or territory.
For more information, see Residency - Individuals.