Jordan has been rocked in recent days by mass protests against price rises and a proposed tax hike as the government pushes measures to slash the country's debt, leading to the prime minister's resignation.
A four-nation summit in the holy city of Mecca, hosted by Saudi King Salman, offered Amman a bailout in the form of a deposit in the Jordanian central bank, World Bank guarantees as well as budgetary support over five years.
"In light of the close brotherly ties... it was agreed that the three countries (Saudi Arabia, the UAE and Kuwait) would provide an economic aid package to Jordan totalling $2.5 billion," the official Saudi Press Agency said.
The crucial summit was attended by Jordan's King Abdullah II, who offered his gratitude to the three countries, adding the package will "contribute to overcoming the crisis", according to SPA.
The announcement comes after European Union foreign policy chief Federica Mogherini on Sunday announced 20 million euros ($23.5 million) in aid for Jordan.
Cash-strapped Jordan, a close US ally that relies heavily on donors, is struggling to curb its debt after securing a $723-million loan from the International Monetary Fund in 2016.
Austerity measures tied to the IMF loan have seen prices of basic necessities rise across the kingdom -- culminating in a week of angry protests over tax proposals that forced prime minister Hani Mulki to resign.
The authorities on Thursday announced they were withdrawing the unpopular legislation, but still face a mammoth task to balance popular demands with the need to reduce the public debt burden.
"The speed and the gravity with which the Gulf states are responding is a very clear testament to their concern and determination to nip this unrest in Jordan in the bud," Lori Boghardt, a senior fellow at the Washington Institute for Near East Policy, told AFP.
"They are going to do all they can to thwart another Arab spring on their doorstep."
Gulf states, except for Bahrain, largely avoided the pro-democracy protests unleashed by the Arab Spring, but they have sought to deepen economic links in the region following an oil price slump in 2014.
Jordan blames its economic woes on instability rocking the region and the burden of hosting hundreds of thousands of refugees from war-torn Syria, complaining it has not received enough international support.
The World Bank says Jordan has "weak growth prospects" this year, while 18.5 percent of the working age population is unemployed.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.