Yingluck Shinawatra says government-backed forum will be held Sunday in Bangkok.
The UN also called on the country to improve education and create more full-time jobs for young people to stop them from emigrating.
Justice for horrors of the 'Killing Fields' are drying up due to elderly defendants' poor health and dwindling funds.
Chinese Foreign Minister Wang Yi says more work is needed on the Code of Conduct and countries should not have unrealistic expectations.
In 'The Missing Picture', Rithy Panh uses clay figurines to tell story of Khmer Rouge brutality
Cases plunge Cambodia into soul searching over how far to pursue war-crimes accusations.
More than 40 pieces of artworks from 34 artists were shown at the French Institute and the German cultural centre in Phnom Penh.