Guterres paid tribute to the peacekeepers at the commemoration of the International Day of United Nations Peacekeepers 2018 at the UN Headquarters in New York, U.S.
He commended the services and sacrifices made by fallen heroes for peace around the world.
The three fallen Nigerian peacekeepers included Lieutenant Colonel Ali Suleiman, who served with the UN Organisation Stabilisation Mission in the Democratic Republic of the Congo.
The others were Warrant Officer Remmy Amakwe, who was deployed with the African Union–United Nations Mission in Darfur and Mr Kolawole Shogaolu, who served in civilian capacity in the UN Multidimensional Integrated Stabilisation Mission in Mali.
Nigeria is the 41st largest contributor of uniformed personnel to UN peacekeeping, according to a recent statistics.
It currently contributes more than 500 military and police personnel to the UN peace operations in Abyei, the Central African Republic, the Democratic Republic of the Congo, Haiti, Lebanon, Mali, Sudan, South Sudan and the Western Sahara.