South Korea's Constitutional Court will hold its final hearing by the end of the month on whether or not to uphold the parliamentary impeachment of President Park Geun-hye.
The parliament impeached Park, 65, in December over allegations of corruption, suspending her presidential powers pending the court's ruling.
She was accused of colluding with a friend, Choi Soon-sil, to pressure big businesses to "donate" nearly $70 million to non-profit foundations which she allegedly used for personal gain.
The court initially planned to wrap up hearings this week but postponed their decision to February 27 after "the president's attorneys asked for more time," South Korean media reported, citing acting chief justice Lee Jung-mi.
The final verdict could be out by March 13, the reports added.
If the court upholds the impeachment, Park will be removed from her post immediately and a presidential election must then be held within 60 days.
The probe into the scandal has seen several senior government officials arrested and a handful of South Korea's most powerful businessmen questioned over their alleged involvement.
Samsung heir Lee Jae-yong was also taken into custody last week over charges of his alleged involvement in the scandal.
Park's lawyers accuse court of bias
In a dramatic twist, Park's lawyers on Wednesday accused one of the judges reviewing her impeachment of bias and asked him to excuse himself.
The Constitutional Court rejected the request, drawing objections from the lawyers who have argued that parliament's vote to impeach Park in December has no legal justification.
Park's lawyers said one of the court's eight judges, Kang Il-won, had consistently shown bias in his questioning of witnesses and had admitted questionable evidence.