The foreign ministers of the three nations meet for talks on Tuesday in Geneva, where they are expected to seek the United Nations’ approval for their joint proposal, they added.
Staffan de Mistura, UN Special Envoy for Syria who steps down at year-end, has tried since January to clinch an agreement on the identity of 150 members of the new constitutional committee to revitalize a dormant peace process.
President Bashar al-Assad’s government and the opposition have each submitted a list of 50 names, but the three nations have haggled over the final 50 members from civil society and “independent” members, diplomats say.
“The three countries are coming with a proposal for the third list, which has been the heart of the problem,” said one diplomat.
Turkey and other nations would consider working with Assad if he won a democratic election, Turkish Foreign Minister Mevlut Cavusoglu said on Sunday, two days before coming to Geneva to meet his Russian and Iranian counterparts Sergei Lavrov and Mohammad Javad Zarif.
De Mistura said at the weekend the constitutional committee could be a starting point for political progress.
“It does touch, for instance, on presidential powers, it could and should be touching on how elections are done, on division of power, in other words a big issue,” he said.