husband or parents?

She can discuss with husband not to migrate, but it still for his prerogative (i do not see he would disused because he is migrating for practical reason.

Taking alone is not an easy one, as Canada would not grant immigration to parents, but if the parents could qualify themselves why they should apply as well? (there are so many sachems like invester, enterpreanures to cover well off but less qualified peoples.

Going alone leaving wife, again according Canadian immigration, wife needed to remain in Canada for 2 years in every 5 years to maintain the immigration status. So leaving her is out of question.

On other side Sharia does not encourage long time separate living of wife and husband live (mainly to safe both parties from temptation of Zina) for practical reasons.

Once girl marries she has to priorities husband.