The Levant Quartet was a formal economic and cultural partnership of Turkey, Lebanon, Syria, and Jordan formed in December 2010. The Quartet had the stated aim of eventually giving rise to an economic, cultural, monetary and political union similar to the European Union in the Middle East. Projected member states included the four founders as well as Bahrain, Iran, Iraq, Kuwait, Oman, Qatar, the United Arab Emirates and Yemen.
The Quartet agreement was formed following a decade of increasing trade and diplomatic traffic between Turkey and the other member states. The Levant Business Forum was set up, with a secretariat at Beirut, with the intention of enabling free circulation of goods and people among the Quartet states. Also planned was a customs union called Shamgen, a pun on Sham and the EU's Schengen Agreement, in which Iran and Iraq would participate by issuing joint visas with Turkey and Syria. The project was effectively put to a stop when Turkey imposed economic sanctions on Syria in the wake of the uprising in Syria, less than a year after it was first announced. The participants in the original Levant Quartet agreement did announce their intention to resume negotiations "as soon as the situation normalizes".
World Bank analysts saw "sizable" benefits for the Levantine countries from the expected increase in trade that the Levant Quartet would have generated, had the Syrian Civil War not halted it. Soner Cagaptay commented that the plan fit within the AK Party's vision of Turkey as "the Brazil of the Middle East, a rising economic power with a burning desire to shape regional events".
- Kurtaran, Gökhan (3 December 2010). "Mediterranean quartet taking step toward union, says Syrian minister". Hürriyet Daily News.
- Cagaptay, Soner (16 August 2013). "The Muslim Brotherhood's Fall Lands Turkey an Unexpected Ally: Kurds". The Atlantic. Archived from the original on 13 December 2013.
- Poverty Reduction and Economic Management Department (2014). Over the Horizon: A New Levant (PDF) (Report). World Bank Group.
- Hurd, Elizabeth (27 April 2011). "Time to stand up, Turkey". Al-Arabiya.
- "Iran, Turkey, Syria, Iraq Will Issue Joint Visa, Hamshahri Says". Bloomberg. 7 March 2011.
- Kurtaran, Gökhan (1 December 2011). "Regional free zone attempt stillborn". Hürriyet Daily News.
- Ianchovichina, Elena; Ivanic, Maros (January 2015). The economic impact of the Syrian war and the spread of ISIS (PDF) (Report). MENA Knowledge and Learning Quick Notes Series. The World Bank.