On 22 August 2017, Manneh was loaned to Segunda División B side CE Sabadell FC.[3] He made his senior debut on 28 October, starting and scoring the first in a 2–0 away win against UE Llagostera.
Etar (loan)
On 23 January 2018, Manneh moved to Bulgarian side Etar Veliko Tarnovo, also on a temporary deal.[4] Manneh made his debut for Etar on 17 February 2018, starting in a 3–3 home draw against Septemvri Sofia. His first professional goal came on 8 March, as he scored the equalizer in a 1–2 away loss against CSKA Sofia.[5]
Górnik Zabrze
In July 2019 Manneh signed a contract with Polish club Górnik Zabrze.[6]
Odense
On the transfer deadline day, 31 August 2022, Manneh was transferred to Danish Superliga club OB, joining them on a three-year contract.[7]
^"Етър взе юноша на Барселона" [Etar take a teenager from Barcelona] (in Bulgarian). SFC Etar VT. 23 January 2018. Archived from the original on 8 April 2023. Retrieved 23 January 2018.