احسن الله إليكم a brother living in canada want to marry a sister from moroco is if permissible for her to come to canada (while preparing to then both make hijra) also is it permissible for her to get the canadian citizenship ( it requires to take an oath)can this lead to kufr?

The marriage is correct, but living there without an urgency is not allowed as the scholars have said. On taking their citizenship, many scholars, among them Shaykh Ibn Uthaymin and the Permanent Committee, said it is forbidden, and some allowed it only in a real necessity, with loyalty kept for the Muslims.