The 21-year-old winger, who hails from Canning Town, joined the Magpies in October 2022 following an impressive trial before making his Premier League debut for Eddie Howe's in a 4-1 win against Chelsea at St. James' Park in November 2023.
Diallo, who began his career in West Ham United's youth ranks, gained his first senior start during Newcastle's A-Leagues All Stars Mens' game against the A-League All Stars at the Melbourne Cricket Ground (MCG) in May 2024.
Following the expiration of his contract at St. James' Park, Diallo moves to Bordeaux, who now compete in the Championnat National 2, the fourth tier of French football, following the club's administrative double relegation at the end of the 2023/24 season.
Everybody at the club would like to wish Amadou the best of luck for the future.