Keeping Lebanon without a government is "increasingly irresponsible" given developments in the region and the country, the United Nations' senior official in Lebanon said on Wednesday.
"Given the situation and developments in the country and the region it is increasingly irresponsible to keep Lebanon without an effective and credible government," UN Special Coordinator for Lebanon Jan Kubis said in a Twitter post.
"I urge the leaders to move without any further delay."
Kubis had held talks with President Michel Aoun on Tuesday.
Lebanon has been without a functioning government since Saad Hariri quit as prime minister in October after protests against the political elite over corruption, leaving the country adrift as a financial and economic crisis deepens.
Spiraling regional tensions since the killing of Iranian military commander Qassem Soleimani by the United States last week have added to the risks facing the heavily indebted state.
The Iran-backed Lebanese Hezbollah party, which is sanctioned by the United States, has said Iran's allies must help exact revenge.
Lebanon's worst economic crisis since the 1975-90 civil war has seen the Lebanese pound slump amid a shortage of dollars and banks tightly control access to cash and block transfers abroad.
Former economy minister Nasser Saidi said last week Lebanon needs an international bailout of up to $25 billion to help avert a potential economic collapse.
The World Bank warned in November the poverty rate could rise to 50% if economic conditions worsen.
After weeks of disputes over the next government, Hariri bowed out of talks with adversaries last month, leading Hezbollah and its political allies to designate Hassan Diab, a former education minister, to form the cabinet.
A political source familiar with the negotiations said there had been "some movement" and a technocratic cabinet was still on course. A second source said government formation efforts were "back on track".
Parliament Speaker Nabih Berri said a new government was needed to reassure the people. Lebanese Forces leader Samir Geagea, a staunch Hezbollah critic, said Lebanon faced "a real catastrophe" and officials had wasted three months.
Diab did not win the support of Geagea or Hariri. Analysts say his political backing from Hezbollah could complicate efforts to secure foreign aid.
Iran's Supreme Leader Ali Khamenei said Hezbollah was acting as the hands and eyes of Lebanon.
"There is still a significant risk that Lebanon gets caught in the cross hairs between the US and its allies and Iran," said Jason Tuvey, senior emerging markets economist at Capital Economics.
