Assad has poured scorn on the idea that the U.S.- and Russian-sponsored conference planned for Geneva next month would end fighting.
“They think a political conference will halt terrorists in the country. That is unrealistic,” he told the Argentine newspaper Clarin.
Meanwhile Oxfam has warned that Jordan and Lebanon were in urgent need of help to support hundreds of thousands of Syrian refugees who had fled the fighting.
More than 70,000 people have been killed in Syria since March 2011.