Answer
(Fatwa: 121/146=L/1429)
If you have pronounced three talaqs to your wife, then all the three talaqs took place and she became haram upon you with mughallazah bainah (irrevocable divorce). Now you both cannot rejoin but after valid halalah. For halalah, the woman will pass her iddah period and marry any Muslim man who sleeps with her, then if he gives her talaq on his own or he dies, then the woman will pass her iddah. Then only, if she wishes she can marry her first husband (you).
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband