"We have to wait for the constitutional court to make its decision on August 16 before determining when we will have the vote again," Wan Noor told reporters.
The Thai baht has weakened this week on the political uncertainty.
After the election Move Forward, along with Pheu Thai and six other parties, forged an alliance to try to form a government.
But Move Forward's leader, Pita Limjaroenrat, was twice blocked by parliament from becoming prime minister.
On Wednesday, Pheu Thai said it would seek to form a new alliance without Move Forward and would nominate real estate tycoon Srettha Thavisin for the premiership.
Persons:
Wan Muhamad, Matha, Wan Noor, Thaksin Shinawatra, Pita Limjaroenrat, Pheu, Srettha Thavisin, Chayut, Devjyot Ghoshal, Edmund Klamann, Robert Birsel
Organizations:
REUTERS, Thomson
Locations:
Bangkok, Thailand, BANGKOK