Media reports suggest that the Tokyo District Court had retracted the plan without proposing a new time frame.
Prosecutors quickly appealed the court's decision, delaying his immediate release but public broadcaster NHK said he could walk out of his detention centre "as early as Thursday".
The elegant 52-year-old with long blonde hair has become a passionate spokeswoman for her husband, loudly proclaiming his innocence as he languishes in a Japanese detention centre
It is believed that Ghosn ad used the money from Nissan for his personal investments into 30 companies.
Prosecutors suspect that Carole Ghosn's company used the money partly to fund the purchase of a luxurious yacht mainly for their family's use.
Ghosn, who cannot be officially removed from his seat on the board without an extraordinary shareholders' meeting, is preparing his defence against charges of financial misconduct.
Instead of a suit, Ghosn, who was flanked by guards, left the prison wearing a blue cap, a white medical face mask and a work jacket with orange reflective stripes.
Though prosecutors appealed against the decision to grant Ghosn bail, Ghosn is banned from leaving Japan and must adhere to conditions aimed at preventing him from fleeing or destroying evidence.
The acceptance of Ghosn's request for bail, his third, came a day after one of his lawyers said he was confident the auto executive would gain his release.
After a meeting on Wednesday, the board also said that he was not eligible for millions of euros' in stock options which were "subject to his presence within Renault".
The former Nissan executive has been in detention since November 19 and faces three charges including under-reporting his compensation and attempting to shift losses to his employer's books.
Former head of the alliance Ghosn is being held in Japan on charges he under-reported millions of dollars in pay as head of Nissan.
The Tokyo District Court's decision came a day after Ghosn promised to wear an electronic ankle bracelet, give up his passport and pay for security guards approved by prosecutors to gain release.
Ghosn, who appeared to have lost a lot of weight in detention, seemed in good health as he denied the allegations against him in a strong voice.
The purpose of the hearing was for the court to explain the reasons for Ghosn's continued detention on suspicion of financial misconduct.