The embassy said in a statement that Hassan Shateri was assassinated by terrorist groups in Syria while he was on his way back to Lebanon from the Syrian city of Aleppo.
Martyr Shateri who was in Aleppo to implement reconstruction and development projects in that city, was assassinated by Syrian terrorists while he was on his way to the Damascus airport to return to Lebanon, the Islamic republic news agency reported.
The Iranian development delegation headed by Martyr Shateri played a major role in reconstructing southern Lebanon after the Zionist regime's 33-day war against the country in 2006.
Martyr Shateri was highly respected by the Lebanese people and officials.
The Lebanese newspaper al-Safir reported on Thursday that martyr Shateri was in Aleppo to study some reconstruction projects in parts of the Syrian city.
A ceremony is to be held for martyr Shateri in Iran's Embassy in Beirut later on Thursday.