Norway’s coalition government is on the brink of collapse after an anti-immigrant party pulled out over the decision to allow an “Isis bride” back into the country from Syria.

The country’s Conservative prime minister, Erna Solberg, said she would continue with a minority government comprised of three coalition parties, including the centrist Liberal Party and the Christian Democrats.

Siv Jensen, the leader of the right-wing Progress Party and outgoing finance minister, said: “I brought us into government, and I’m now bringing the party out.”

She said “the cup is now full” after a 29-year-old Norwegian woman of Pakistani descent arrived in the country on Saturday with her two children.

The woman, who had reportedly travelled to Syria in 2013 and married a Norwegian foreign fighter, who was later killed in fighting, was formally arrested on her return and placed in a hospital in Oslo with both children.

Timeline of the Isis caliphate Show all 19 1 /19 Timeline of the Isis caliphate Timeline of the Isis caliphate ISIS began as a group by the merging of extremist organisations ISI and al-Nusra in 2013. Following clashes, Syrian rebels captured the ISIS headquarters in Aleppo in January 2014 (pictured) AFP/Getty Timeline of the Isis caliphate Abu Bakr Al-Baghdadi declared the creation of a caliphate in Mosul on 27 June 2014 Timeline of the Isis caliphate Isis conquered the Kurdish towns of Sinjar and Zumar in August 2014, forcing thousands of civilians to flee their homes. Pictured are a group of Yazidi Kurds who have fled Rex Timeline of the Isis caliphate On September 2 2014 Isis released a video depicting the beheading of US journalist Steven Sotloff. On September 13 they released another video showing the execution of British aid worker David Haines Timeline of the Isis caliphate The US launched its first airstrikes against Isis in Syria on 23 September 2014. Here Lt Gen William C Mayville Jnr speaks about the bombing campaign in the wake of the first strikes Getty Timeline of the Isis caliphate Isis militants sit atop a hill planted with their flag in the Syrian town of Kobani on 6 October 2014. They had been advancing on Kobani since mid-September and by now was in control of the city’s entrance and exit points AFP/Getty Timeline of the Isis caliphate Residents of the border village of Alizar keep guard day and night as they wait in fear of mortar fire from Isis who have occupied the nearby city of Kobani Getty Timeline of the Isis caliphate Smoke rises following a US airstrike on Kobani, 28 October 2014 AFP/Getty Timeline of the Isis caliphate YPG fighters raise a flag as they reclaim Kobani on 26 January 2015 VOA Timeline of the Isis caliphate Isis seized the ancient Syrian city of Palmyra on 20 May 2015. This image show the city from above days after its capture by Isis Getty Timeline of the Isis caliphate Kurdish forces are stationed on a hill above the town of Sinjar as smoke rises following US airstrikes on 12 November 2015 AFP/Getty Timeline of the Isis caliphate Kurdish forces enter Sinjar after seizing it from Isis control on 13 November 2015 AFP/Getty Timeline of the Isis caliphate Iraqi government forces make the victory sign as they retake the city of Fallujah from ISIS on 26 June 2016 Getty Timeline of the Isis caliphate Iraqi forces battle with Isis for the city of Mosul on 30 June 2017 AFP/Getty Timeline of the Isis caliphate Members of the Iraqi federal police raise flags in Mosul on 8 July 2017. On the following day, Iraqi prime minister Haider Al Abadi declares victory over Isis in Mosul Getty Timeline of the Isis caliphate Members of Syrian Democratic Forces celebrate in Al-Naim square after taking back the city of Raqqa from Isis. US-backed Syrian forces declare victory over Isis in Raqqa on 20 October 2017 after a four-month long campaign Getty Timeline of the Isis caliphate Female fighters of the Syrian Democratic Forces celebrate in Al-Naim Square after taking back the city of Raqqa from Isis. US-backed Syrian forces declare victory over Isis in Raqqa on 20 October 2017 after a four-month long campaign AFP/Getty Timeline of the Isis caliphate Trucks full of women and children arrive from the last Isis-held areas in Deir ez-Zor, Syria in January 2019 They were among the last civilians to be living in the ISIS caliphate, by this time reduced to just two small villages in Syria’s Deir ez-Zor Richard Hall/The Independent Timeline of the Isis caliphate Zikia Ibrahim, 28, with her two-year-old son and 8-month-old daughter, after fleeing the Isis caliphate, on Saturday 26 January 2019 Richard Hall/The Independent

One of the woman’s children was said to be quite ill and a government announcement explained she received help to return to Norway from Syria so the child could get medical treatment.

Ms Solberg said she “understood” why the Progress Party wanted to leave her coalition government and she would seek cooperation with the party, which is Norway’s third largest.

The exit of the Progress Party means Ms Solberg no longer has a parliamentary majority, which could make it harder for the coalition to govern the country.

Norway’s next parliamentary election is scheduled for September next year, and Ms Solberg will need the support of parties outside the government to stay in office and pass legislation in the 169-seat parliament.

Isis flag raised at Syrian camp holding jihadist families

Ms Jensen said many believed the mother “used her child as a shield to come back to Norway”.

“There are many ... who are displeased by this, not just in the Progress Party,” she said last week.

The mother, who has not been named, refused to let her sick child travel alone to Norway, which then allowed her to travel from the Kurdish-controlled camp at al-Hol, where the family had been detained since March last year.

She has denied the charges against her and will fully cooperate with the police during interrogation, her lawyer has said.

“A majority in the government believed that concern for the child was paramount,” Ms Solberg said.

Decisions about whether to help women with ties to Isis return from Syria have caused controversy across Europe. In Finland, the recently appointed government settled on a compromise to decide each case individually.