She was born in 2002 in Istanbul. She is the second child and only daughter of a family of four children. She lost her father at a young age. When she was 14 years old, Büşra Işıldar started boxing to get rid of her excess weight.[2]
In 2017, she won the gold medal in the Turkey Youth, Junior and Senior Women's Individual Boxing Championship held in Muğla's Fethiye district, which was the first tournament she participated in after winning the Istanbul championship. In 2018 and 2019, she became the champion of Turkey.[3]
She became champion for the first time in 2017 at 80 kg in the European Youth Girls Boxing Championships.[4] She won the European championship for the second time by competing in the final at +80 kg at the European Youth Girls Boxing Championships held in Anapa, Russia in 2018, in 2019, she competed at +81 kg in the championship held in Sofia, the capital of Bulgaria, and won the European championship for the third time at the 2019 European Junior Championships.[5]
In 2021, she participated in the 81 kg final bout at the 2021 AIBA Youth World Boxing Championships organised by the International Boxing Association (AIBA) in Poland and won the gold medal.[6]
Büşra Işıldar became the European Champion at the U22 European Boxing Championships hosted by Budva, Montenegro. Competing in the 75 kg final, Büşra Işıldar defeated her Ukrainian rival Veronika Nakota 4-1 and completed the organisation with a gold medal.[7]
