Is it permissible for a father to temporarily relinquish custody of his children to their mother after divorce, for ages 17, 13, and 11, and what is the amount of monthly maintenance due from him with a salary of 6000 UAE dirhams, and does he have other obligations?

If the children's mother is righteous and capable of raising the children properly, there is no harm in entrusting their upbringing to her. However, if she is not upright or is unqualified, then this is not permissible because raising children is the responsibility of the parents, as the Prophet, peace and blessings be upon him, said: "Each of you is a shepherd and each of you is responsible for his flock." As for the amount of maintenance, it depends on multiple considerations.