She will now return to Ottawa on Wednesday.
"I have decided to return to Canada and I'll leave tomorrow," Jean told CBC News Tuesday in Prague.
"The role of the Governor General is to ensure that our governance is on the right path, so as soon as I'm back I will fulfil my duties in total sound judgment."
Late Monday, the Liberals and New Democrats inked a deal to form an unprecedented coalition government if they succeed in ousting the minority Conservative government in an upcoming confidence vote scheduled for Dec. 8.
Jean said she had not spoken with Prime Minister Stephen Harper and made the decision herself to cut the visit short.
Liberal Leader Stéphane Dion, who would head the proposed coalition, said on Monday that he has sent the governor general a letter stating he has the confidence of the House of Commons to form the government should the Conservatives be defeated.
But Jean gave no hint about whether she might approve such a coalition.
"The message in the letter is clear. It is part of the whole context," Jean said. "I think my presence is required in the country."
The governor general could decide to send Canadians to the polls. There is also talk that Prime Minister Stephen Harper could block coalition efforts by proroguing Parliament, suspending it without dissolving.
Are you in favour of the government being brought down and replaced by a coalition government over the fiscal update?