The ex-president has made no comment since she was forced from office Friday when the country's Constitutional Court unanimously upheld parliament's decision to impeach her over a corruption scandal.
Thousands of riot police were deployed as some 50,000 anti-Park protesters took to the streets to celebrate the verdict, chanting: "The people have won! Arrest Park!"
Some 20,000 angry pro-Park flag-waving protesters rallied near the City Hall, demanding a review of the one-off decision. Police set up barricades to keep the rival protests apart.
A third person died Saturday in hospital after he lost consciousness the day before in a clash between pro-Park supporters and riot police, near the Constitutional Court which confirmed her impeachment.