A British-Iranian woman who has been imprisoned by Iran for more than two years was released Thursday, but only for three days.
"Iran's judiciary should immediately free Nazanin Zaghari-Ratcliffe to end the tragic saga she and her family have been suffering through", he added.
Although the initial release is for three days her lawyer is hopeful that this can be extended, her husband said.
Mr Ratcliffe said: "Furlough is not full freedom - we want her home, not just on holiday from prison - but it is still such a good step".
Her husband, Richard, said she was released from Evin prison on Thursday morning until Sunday.
Mrs Zaghari-Ratcliffe was arrested in April 2016 at the airport in Tehran after visiting her family with her young daughter.
Free Nazanin Campaign Nazanin Zaghari-Ratcliffe reunited with her daughter Gabriella.
On July 24, 2018, a judge had told Zaghari-Ratcliffe that she would not be permanently released until the United Kingdom paid an old debt it owes Iran.
Hunt told reporters at United Nations headquarters in NY that she "is innocent" and "every day that she is in prison is a reminder to the whole world of a gross injustice".
The British arm of Amnesty International also celebrated her temporary release as an "amazing news". Her family denies this, saying says she was in Iran to visit family.
Foreign Secretary Jeremy Hunt tweeted: "Really good news that Nazanin has been released on furlough, credit to tireless campaigning by husband Richard and her friends". He said there was some indication that this would happen, but there had been a number of "false dawns".
Johnson later travelled to Tehran to try and fix the damage, but was unsuccessful in securing her release.
Mr Ratcliffe said: "It's great for Nazanin today to be seeing all the news attention and realise how much care there is out there". "I wasn't expecting it at all when it was mentioned two weeks ago".
Bail for her temporary release was set at one billion rials ($23,800), with her family's home in Tehran used as collateral, the campaign said.
Hunt earlier in the day welcomed Zaghari-Ratcliffe's release on Twitter. "Nazanin is innocent", he said during a short briefing at the United Nations.
Cohen's hush payments 'not even a campaign violation', Trump says
She referred substantive questions to the president's personal counsel Rudy Giuliani , who was at a golf course in Scotland. Trump's attorneys said Cohen is lying in order to get better treatment from prosecutors over his own illegal conduct.