Tonga's Prime Minister Akilisi Pohiva will continue as the country's interim leader until elections are held later this year.
King Geroge Tupou VI dissolved Parliament on Thursday and called for fresh elections to be held by November 16.
Without giving a specific reason, the King says he intervened after taking advice from the country's Speaker.
In a communication from Palace Office, Lord Chamberlain says the current government will remain in place in a "caretaker" role until elections are held.
The statement says the "health and educational services to the people should remain a priority".
Mr Pohiva has faced criticism from his opponents and has been accused of nepotism and overspending during his time as leader. However, previous attempts to have him pushed under a vote of no confidence have failed.
Mr Pohiva is a long time pro-democracy campaigner and the first commoner to be elected as Prime Minister.