He did not perform Tawaf-ul-Ifadah thinking that Tawaf-ul-Wada` would suffice

Q: Allah Almighty helped me offer Tamattu` Hajj (`Umrah during the months of Hajj followed by Hajj in the same year with a break in between) with my father and some of my relatives. We all performed all Hajj rituals except Tawaf-ul-Ifadah (final obligatory circumambulation of the Ka`bah in Hajj) thinking that Tawaf-ul-Wada` (circumambulation of the Ka`bah on leaving Makkah) would suffice. I suspected the authenticity of that, so I hope that you will direct me regarding that. I should mention that this happened three years ago. Answer us, may Allah reward you and forgive you! We implore Allah to grant you a blessed end and preserve you for Islam and Muslims!

A: If you delayed Tawaf-ul-Ifadah and performed it before leaving Makkah, it would suffice for Tawaf-ul-Wada`. However, if you only performed Tawaf-ul-Wada` and did not have the intention of performing Tawaf-ul-Ifadah, then your Hajj would not be complete unless you do Tawaf-ul-Ifadah. Therefore, you are obliged to return to Makkah to perform Tawaf-ul-Ifadah and Sa`y (going between Safa and Marwah during Hajj and `Umrah) if you were performing Tamattu` Hajj. The same applies to the case of offering Qiran Hajj (combining Hajj and `Umrah without a break in between) or Ifrad Hajj (performing Hajj only) if you did not offer Tawaf-ul-Qudum (circumambulation of the Ka`bah on arrival in Makkah). Furthermore, if any of you had sexual intercourse during this period, it is Wajib (obligatory) on the one who did that to slaughter a Fidyah (ransom) in Makkah which is a sheep meeting the same conditions for Ud-hiyah (sacrificial animal offered by non-pilgrims) and distribute its meat among the poor of the Haram (all areas within the Sacred Sanctuary of Makkah).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.