Calls for ousted President Park Geun-hye’s arrest are growing in South Korea.
Despite the ruling, Park Geun-hye remains inside the presidential compound.
Thousands turned out for rallies in Seoul on March 11, a day after three people involved in protests died there.
Many were calling for the impeached president’s arrest, although a smaller number of her supporters also gathered in nearby streets.
There are fears the two sides may clash and there is a heavy police presence.
A spokeswoman for the protesters supporting the court’s decision, Choi In-sook, told Reuters they were demanding the arrest of Park Geun-hye.
She has lost her presidential immunity and could face criminal charges.
Meanwhile, South Korea’s election commission announced a “free and fair” vote would be held by May 9 at the latest.
Currently, Moon Jae-in of the Democratic Party is leading in the polls, with one survey putting him almost 22% ahead of his nearest rival, acting president Hwang Kyo-ahn, who is loyal to Park Geun-hye.
Hwang Kyo-ahn has called for calm, saying the government should remain stable to prevent internal conflict from spreading.
However, police are bracing themselves for more violence following the deaths of two of Park Geun-hye’s supporters on March 10.
A third person, aged 74, is understood to have had a heart attack during March 10 protests, and died on the next day, according to Reuters.
Park Geun-hye’s office said she would not be leaving the Blue House, South Korea’s presidential palace, on March 10 nor making any statement.
It is understood Park Geun-hye will not leave until her own home in Seoul is repaired and cleaned.