What should a married man who wishes to marry a foreign woman for the purpose of residing in Europe, knowing that he has divorced his first wife by mutual consent and wants to return to her, do?

If marriage to a foreign woman is a sham, then it is forbidden. However, if it fulfills the conditions of validity, then it is sound. If you divorced your first wife with a first or second divorce, you can take her back before the 'iddah (waiting period) ends. If the 'iddah has ended, then a new contract, a guardian, and witnesses are required. If it was the third divorce, then she is irrevocably divorced from you and is not permissible for you unless she marries someone else willingly, and he divorces her or dies, and her 'iddah ends. We warn that a Muslim residing in disbelieving countries poses a danger to their faith and morals, except in specific cases with legitimate Islamic controls.