The International, Impartial and Independent Mechanism for Syria (IIIM) was established by the UN General Assembly in 2016 to assist in the investigation and prosecution of persons responsible for the most serious crimes under international law committed in Syria since March 2011.
Its role is somewhat different from a typical UN programme. The IIIM does not itself prosecute or try individuals. Instead, it collects, preserves, analyses and shares evidence and information with national, regional and international jurisdictions that have or may have jurisdiction over these crimes.