Kuwait's Emir said it would lend $1 billion and commit a further $1 billion of investments to Iraq, joining a group of global backers that have this week pledged funds to bolster the country's recovery.
The emir of Kuwait, Sheikh Sabah Al Ahmad Al Sabah, had pledged to give $2bn in loans and investments.
Saudi Arabia said it would allocate $1 billion for investment projects in Iraq and $500 million to support Iraqi exports. "It can not be undertaken alone, which calls us to the worldwide community to take part of this mission", he said on the last day of the conference in Kuwait City.
Riyadh pledged on Wednesday $1.5 billion to help rebuild Iraq after the war against ISIS terrorist group.More news: Our First Interstellar Visitor May Have a Violent Past
Canada is working with the United Nations Development Program's stabilization and mine advisory group, which helps displaced people return home and supports the clearance of unexploded munitions and improvised explosive devices.
However, officials acknowledge a feeling of fatigue from global donors, especially after the wars in Iraq and Syria sparked the biggest mass migration since World War II.
The fighters have also been largely defeated in neighboring Syria.
The U.S. alone spent $60 billion over nine years - some $15 million a day - to rebuild Iraq.More news: Khloé Kardashian Reveals How She Knew Tristan Thompson Was 'The One'!
The United States also announced that it would be offering a $3 billion credit line but was not providing direct government assistance. That money would include loans, loan guarantees and insurance devices to encourage American investment in Iraq.
More than 70 countries would attend the Wednesday meeting.
Qatar, meanwhile, remains boycotted by four Arab nations, including three in the Gulf, which has split the typically clubby relations among the nations. Such finance, donor countries said, is necessary to raise the total funds needed for Iraq.
Iraqi Prime Minister Haider al-Abadi had previously vowed that his government would work towards combatting corruption and bureaucracy in the country.More news: Ants nurse wounded warriors back to health