Diallo was born in
Nice, and began triple jumping in 2006. She set a new French national junior record at an event in
Argentan in 2014, with an attempt of 13.74 m. Her fourth attempt of 14.20 was accepted as a national junior record, and also became the 15th longest attempt of all time in the junior women's triple jump. She became the third French triple jumper to win a world junior title for France after
Benjamin Compaoré in
2006 and
Teddy Tamgho in
2008. ==Personal life==