Yes, but only under specific conditions tied to the type of talaq pronounced. A first or second revocable (raj'i) divorce can be undone during the iddah simply by the husband expressing his intention to resume the marriage, whether verbally or through resuming marital relations — no new contract, wali, or fresh mahr is needed, since the Quran affirms that husbands have the better right to take their wives back during this period if they seek reconciliation, not to cause harm. If the iddah ends without any reconciliation, the divorce becomes irrevocable, and resuming the marriage then requires an entirely new nikah with mutual consent and a new mahr. After a third pronouncement, the divorce is permanently irrevocable between that couple, and reconciliation is not possible unless the woman first genuinely marries another man in a marriage intended to last, which subsequently and independently ends. Scholars strongly discourage using this rule as a loophole or arranging a sham intervening marriage purely to permit remarriage, viewing such arrangements as a violation of the spirit of the law even where the outward form might seem to comply.
Q&A · Marriage & Divorce
Can a divorce be revoked once it has been pronounced?
Informational, not a personal fatwa. Consult a qualified scholar for rulings on your situation.