[2] In March 2014 he moved to Granada CF in Spain, being assigned to the reserves in Segunda División B, for a reported fee of one million dalasi.

[3] Marreh made his senior debut with the side on 15 March 2014, starting in a 0–0 draw against FC Cartagena;[4] roughly a month later he netted his first goal abroad, scoring the first of a 6–1 home win over Écija Balompié.

[5] On 21 March, Marreh was called up to the Andalusians' main squad ahead of the La Liga match against Elche CF;[6] he remained on the bench in the 1–0 win at the Estadio Nuevo Los Cármenes, however.

[8] On 10 July 2017, after having his federative rights assigned to Watford, Marreh was loaned to Segunda División club Real Valladolid for one year.

[14] He played his first official match on 15 June of the following year, starting in a 1–4 2013 Africa Cup of Nations qualification loss against Algeria.