The National Salvation Front said Tuesday it will reject parliamentary elections unless authorities guarantee they will be fair and subject to international monitoring.
The announcement came after a three-hour closed meeting that included Dostour chief Mohamed ElBaradei, Wafd Party leader Al-Sayed al-Badawy and Freedom and Justice Party Chairman Saad al-Katatny.
Hamdeen Sabbahi, founder of the Popular Current Party, did not attend.
The NSF called for a neutral government that had the support of numerous parties and was able to solve Egypt's political gridlock.
It also said it holds the president responsible for the nation's economic and social deterioration as a result of interference from the Muslim Brotherhood.
The NSF added that the Nour Party's initiative to bring together opposing political factions could help the country move past its impasse.