The Iranian documentary competed with films from the UK and Argentina, Mehr News Agency reported.
It had earlier participated in festivals in the US, Russia, Egypt, Italy and Australia winning awards in the US and Moscow.
'Alone among the Taliban', a 65-mintue documentary, illustrates the director's 15 days of tense and dread-filled experience among members of Taliban terrorist group in Afghanistan who were armed to the teeth, and with whom Iran carries a dark history after the 1998 attack on the Iranian consulate in Mazar-i Sharif and the subsequent assassination of 11 Iranian diplomats.
Eslamzadeh goes to places impossible to visit, interviews members of the Fatwa council, undertaking a dangerous journey to make the piece.
The documentary was first screened in Iran's Ninth International Documentary Film Festival 'Cinéma Vérité' in 2015, winning the International Shahid Avini Award for the Best Mid-Length Documentary. Eslamzadeh's production had its seventh international screening at the Marbella film festival after participating in festivals in the US, Egypt and Russia. It has also won Best Documentary Award at the 44th Athens International Film and Video Festival (AIFVF) in April 2017.
The 12th Marbella International Film Festival was held on the Costa del Sol in Spain from October 4 to 8 2017.