Pacome Dadiet was born on July 27, 2005 in Aubagne, Bouches-du-Rhone France and is of Ivorian descent. As a youth, he joined the club Saint-Charles Charenton in 2011. where he was teammates with fellow 2024 draft hopeful Tidjane Salaun. He remained with this squad through 2020.
Dadiet made his pro debut for the Paris Basketball first team, in the LNB Pro A, in October 2021 at the age of 16. He appeared in eight games in the 2021-2022 seasson for the main squad.
Dadiet sought to leave Paris and join the German Team Ratiopharm Ulm in 2022, but was involved in a contractual dispute. He did not join the German team until January of 2023. He played for the Ulm Developmental team, Orange Academy, in the German third tier, in the 2022-2023 season, averaging 16.0 points and 4.2 rebounds.