Jlassi competed in the girls' freestyle 73 kg event at the 2018 Summer Youth Olympics held in Buenos Aires, Argentina.

[2][3] In that same year, she competed in the women's 65 kg event at the 2021 U23 World Wrestling Championships held in Belgrade, Serbia where she was eliminated in her second match.

[4] Jlassi won one of the bronze medals in the women's 65 kg event at the 2022 Yasar Dogu Tournament held in Istanbul, Turkey.

[6] She lost her bronze medal match in the women's 68 kg event at the Mediterranean Games held in Oran, Algeria.

[9] Jlassi won the bronze medal in the women's 65 kg event at the 2023 Ibrahim Moustafa Tournament held in Alexandria, Egypt.