Zardari, who is undergoing treatment at a hospital in Islamabad, has maintained in the bail plea that he is suffering from a heart condition as well as diabetes.
The IHC has also allowed Musharraf's counsel Barrister Salman Safdar to assist the counsel appointed for the former military ruler during the hearing, if he so wishes.
The order came on a petition filed by the Pakistan government which had requested the court to set aside the special court's decision to announce its judgement in the high treason case on November 28.
The petition, which was filed by Advocate Saleemullah Khan on Monday, said that premier Imran Khan had 'committed serious contempt', according to reports.
The high treason trial of the former leader has been pending since December 2013 when he was booked in the case.
Sharif, 69, was admitted to the Services Hospital on Monday night from Pakistan's anti-graft body's custody after his platelets dropped to a critical low level of 2,000.
32-year-old Gulalai, who is currently residing with her sister in New York, has applied for political asylum.
Sharif along with his daughter Maryam and son-in-law Mohammad Safdar was convicted in the Avenfiled case last year but the sentence was later suspended by the IHC.
The apex court made the observation while giving verdict on a set of petitions about the video scandal involving Malik, who awarded seven years of imprisonment to 69-year-old Sharif.
Islamabad HC also set the same date to hear the National Accountability Bureau's appeal against Sharif's acquittal in the Flagship Investment case.
The Islamabad High Court today dismissed ousted Prime Minister Nawaz Sharif's plea to club three corruption cases against him.