Is the marriage valid after a Muslim girl recently moved with her fiancé to his country and the marriage contract was solemnized in the presence of an imam and witnesses, without the permission of her non-Muslim family, knowing that the imam of her country advised against the marriage?

The answer criticizes the Imam's advice to marry from the same country because it does not apply to the questioner's situation. If the marriage contract was concluded between the questioner and the Muslim girl with valid offer and acceptance, and it fulfilled the pillars of marriage, and the matter was handled by the local Imam or the director of the Islamic center, then the marriage is valid. This is the case even if the girl's travel without a mahram (definition) was impermissible, and even if it was possible to bring her family for the marriage.