A US Central Command investigation found that an aid worker and nine members of his family, including seven children, died in the 29 August strike.
The youngest child, Sumaya, was just two years old.
The deadly strike happened days after a terror attack at Kabul airport, amid a frenzied evacuation effort following the Taliban’s sudden return to power.
It was one of the US military’s final acts in Afghanistan, before ending its 20-year military operation in the country.
US intelligence had tracked the aid worker’s car for eight hours, believing it was linked to IS-K militants – a local branch of the Islamic State (IS) group, US Central Command Gen Kenneth McKenzie said.