Dar, a senior politician in the ruling party of Prime Minister Shehbaz Sharif, flew to Islamabad on Monday night after ending five years in self-exile in London.
In 2017, he had been facing corruption charges he says were politically motivated, but last week an anti-graft court suspended warrants for his arrest, enabling his return.
On Wednesday, the court extended the suspensions.
"I told the court that my passport was revoked," Dar said.
"I wasn't able to travel for the last four years," he added, describing the legal action against him as political victimisation by the previous government of Prime Minister Imran Khan. Khan's party denies this.
Analysts say Dar's key mandate is to halt inflation that mainly stems from his predecessor's unpopular decisions to stick to preconditions set by the International Monetary Fund (IMF), including rolling back subsidies made by Khan's government.
Sharif's coalition government says it inherited a wrecked economy after Khan's ouster in a vote of no-confidence in April, a charge the former premier denies.
As the new government took over, the IMF's $6 billion bailout package agreed in 2019 was in question because of the lack of an agreed policy framework.
Last month the IMF board approved the programme's seventh and eighth reviews, allowing the release of more than $1.1 billion in funding assistance.
Former finance minister Ismail had said the tranche was likely to be increased after Pakistan sought help to remedy economic losses of an estimated $30 billion caused by the unprecedented floods.
The disaster could cut economic growth to below 3%, from 5% estimated for fiscal 2022-23, the government has said.
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