If a man gave his wife three talaaqs, then it falls immediately and he cannot take it back.
The only possibility of them getting back together is in the situation where she marries another man who consumates the marriage. If this second husband later happens to divorce her, then she would be halaal for the first husband.
and Allah Ta’ala Knows Best
Ml. Husain Kadodia
FATWA DEPT.
CHECKED & APPROVED: Ml. Imraan Vawda