Jonas Adjei Adjetey (born 13 December 2003) is a Ghanaian professional footballer who plays for Swiss Super League side FC Basel and the Ghana national team.
Born in Accra, Ghana, Adjetey played his youth football with the local clubs in that area.
At the end of June 2022 FC Basel started their new training week with the Ghanaian guest Adjetey, following which he was offered a contract and thereafter joined the U-21 team, who played in the Promotion League, the third tier of Swiss football.
Adjetey (19) played centre-back over the full 90 minutes, in a chain of three defenders, with the likewise young Nasser Djiga (20) and Finn van Breemen (20) on his sides.
Both Djinga and van Breemen each scored a goal during the first half, as Basel went on to win 8–1 against amateur club FC Saint-Blaise.