Kuş is a native of Adana, Turkey.[3] She has been performing taekwondo since age 8. Currently, Kuş is studying Physical Education and Sports at Çukurova University in Adana.[4]
In 2013, she obtained the silver medal at the Islamic Solidarity Games held in Palembang, Indonesia.[5] Kuş won the silver medal at the 2014 World University Taekwondo Championships in Hohhot, China.[4] She became gold medalist at the European Junior Championship in Innsbruck, Austria in 2014,[6] and continued her success by winning another gold medals at tournaments in 2015 including Dutch Open in Antalya,[7] and Moldova Open in Chișinău.[8]
She won the gold medal at the 1st ETU European Championships Olympic weight categories held in Nalchik, Russia in 2015.[9][10] Nafia Kuş won a bronze medal at the 2015 World Taekwondo Championships held in Chelyabinsk, Russia.[11] She won the gold medal in the +73 kg division at the 2015 Dutch Open Tournament in Eindhoven.[12] At the 2020 German Open Tournament in Hamburg, she became gold medalist in the +73 kg division.[13] Kuş took the gold medal in the -73 kg division at the 8th Turkish Open Tournament held in Istanbul.[14]
Nafia Kuş won the gold medal at the 2023 World Taekwondo Championships held in Baku, Azerbaijan, in the women's +73 kg, defeating Greek athlete Paraskevi Ntemogianni in the first round, Reba Stewart from Australia in the second round, Gloria Mosquera from Colombia in the quarterfinals and Russian athlete Kristina Adebaio in the semifinals. In the +73 kg final, she fought with Uzbek last world champion Svetlana Osipova. Nafia Kuş, who also defeated Svetlana Osipova, won the gold medal and became the world champion.[16]