Turkey's Foreign Ministry confirmed in a statement an "employee was martyred" in an "atrocious attack" outside the consulate in the Iraqi city of Erbil.
The trio of countries cited the ongoing blockade as their reason for not attending, as the tournament is left with just five remaining teams.
Iraq has always played a defining role in the destiny of the Middle East, but its sovereignty is being threatened by its all-powerful neighbour and the US.
The strength of Turkey's democracy and the Turkish people showed their dedication to democratically-elected institutions when they took to the streets following the July 15 coup attempt.
Critics have bemoaned the slow progress made by an investigative team of the UN Security Council but the agency outlined solid gains made in recent months.
Turkey launched Operation Claw against the terrorist organization PKK in the Hakurk region of northern Iraq on May 27.
Operation Claw-2 aims to destroy caves and shelters used by the PKK terror organisation in northern Iraq, Turkish defense ministry said.
Many Turkish businessmen are facing huge losses as their products are systematically banned in Iraq, while sanctions-hit Iran pursues its own business interests in the country.
The museum said it has been working with law enforcement agencies to return the works smuggled out during recent periods of conflict.
The Turkish Army and Intelligent Secret Service conducted a joint operation on the Mout Qandil headquarters of the PKK terror group in northern Iraq, killing Diyar Garip Muhammad.
The city on the Euphrates River is about 85 kilometers south of the capital Baghdad and once was a main tourist attraction before Iraq suffered one war after another in the past four decades.
Baghdad has become the centre of a tug of war between Washington and Tehran, but it's trying its best to maintain a balance between the two rivals while pursuing its own interests.
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