Final answer:
The Sura recited in the 3rd part of our Dua is Surah Al-Kafirun.
Step-by-step explanation:
Surah Al-Kafirun is the 109th surah of the Qur'an and it is a short surah composed of 6 verses. It is often recited in the third part of the Dua because it emphasizes the rejection of disbelief and the importance of staying true to one's faith.
The recitation of specific Surahs (chapters) in the third part of a dua (supplication) may vary depending on individual practices or traditions within Islam. There isn't a universal rule specifying a particular Surah for the third part of a dua. Muslims are generally free to make personal supplications and seek blessings from Allah using any appropriate verses or prayers from the Quran.