A meeting of experts from the 15-nation Security Council has been held three times to negotiate the latest draft, being drafted by Kuwait, Germany and Belgium last month, Reuters reported.
The approval of the draft would require the approval of nine countries and the non-use of the veto by any of the five permanent members - Russia, China, France, Britain and the United States.
Diplomats told Reuters who did not want to be named that Russia had asked that military attacks against "armed groups" inscribed on the Security Council's list be excluded from the truce.
The control of Idlib is shared by Syrian regime forces and its allies, while other areas are subject to Turkish-backed mercenary groups, most notably the HTS (formerly Jabhat al-Nusra).
Diplomats said the United States and other countries were refusing to do so. Instead, the draft calls on “Member States to ensure that all measures taken to counter terrorism, including in Idlib governorate, comply with their obligations under international law”.
Russia and China introduced their draft resolution on Wednesday, which “reaffirms that the cessation of hostilities will not apply to military operations against individuals, groups and entities associated with terrorist organizations defined by the Security Council”.
Despite the many truces agreed upon during the Syrian war, most of them have not been implemented on the ground.