"There has been a decision... in Saudi Arabia, in Turkey and in Qatar to derail inter-Syrian decision-making," the regime's lead negotiator in Geneva, Bashar al-Jaafari, said in an interview with Lebanese channel Al-Mayadeen.
"They do not want there to be a dialogue between Syrians -- they want to make the Geneva negotiations fail."
"The Saudi, Turkish and Qatari sponsors do not want to stop the bloodbath in Syria and do not want a political solution in Syria," he added.
Jaafari said the opposition and the countries that support it are "annoyed because of the progress being made by the Syrian army on the ground".
The UN struggled Monday to keep the troubled Geneva talks on track, as the opposition suspended its "formal participation", accusing the government of alleged violations of a fragile ceasefire in place since February 27, AFP reported.
Riad Hijab, coordinator for opposition umbrella group the High Negotiations Committee (HNC), said it was "unacceptable" for the negotiations to continue while the government of President Bashar al-Assad continues to "bombard" Syria.
But UN peace envoy Staffan de Mistura insisted the ongoing round of indirect discussions, which began on April 13, would continue through the week as planned.
Jaafari said Monday that an "expanded government" was its objective in Geneva. "The presidency has nothing to do with the activities of the delegations (and discussing this issue) is not the responsibility of the negotiators in Geneva," he added.