Court proceedings against Conrad Black have been pushed back a further day to Thursday 1 December, at the request of the media tycoon's lawyers.
Lord Black could face up to 40 years in prison if found guilty
Lord Black had been expected to appear before a judge in Chicago on Wednesday, following an adjournment last week.
He and three others are accused of fraudulently diverting almost $84m (£49m) from Hollinger International, the newspaper group he used to lead.
The former owner of the Daily Telegraph newspaper has denied the charges.
Lord Black is now scheduled to appear before US district judge Amy St Eve at 1730 local time (2230 GMT) on Thursday, a spokesman for prosecutor Patrick Fitzgerald said.
Two of Lord Black's co-defendants, accountant John Boultbee and former Hollinger International executive Peter Atkinson, are expected to appear in court on Wednesday.
The hearings will offer the defendants the opportunity to enter innocent of guilty pleas to the charges against them.
Canadian-born Lord Black could face up to 40 years in jail if found guilty of the charges.
Lord Black was ousted from Hollinger International's board in 2003. The company has since sued him.