Bluffton College, Ohio, United States of America, 1963-1965. Albany State Teachers College, 1967. Columbia University, 1967.
Institut Universitaire des Hautes Etudes Commerciales, Switzerland, 1969-1970, Bachelor of Arts Pol Science(s). Spoken languages: Fulani, French, English.
He was Minister of Foreign Affairs of Upper Volta (now Burkina Faso) from 1983 to 1984. Diallo began entered the United Nations as the Director of the United Nations Sudano-Sahelian Office from 1979 to 1983. After leaving the U.N., Diallo was appointed as Minister of Foreign Affairs under Captain Thomas Sankara on 24 August 1983, serving in that position until 1984.
From 1988 to 1989, Diallo served as Ambassador to China, India and Japan. Thereafter, Diallo returned to the United Nations as the Special Representative of the Secretary General for the Conference on Environment and Development from 1990 to 1992 and as Executive Secretary of the United Nations Convention to Combat Desertification beginning in 1996. In the National Assembly, he sat as part of the Alternance-Démocratie-Justice Parliamentary Group and served as Fifth Vice-President of the National Assembly.
He was re-elected to the National Assembly in 2012, and also served as Mayor of Dori. Diallo, who was 75 years old, reportedly died unexpectedly of heart failure.
Diallo was elected to the National Assembly in the May 2007 parliamentary election as a candidate of the Party for Democracy and Socialism (PDS) in Séno Province.
A member of the opposition to President Compaoré, Diallo remained active in opposition politics and continued working in his two elected posts as Deputy and Mayor until his death on the night of 30 September–1 October 2014.
Spouse Hapsatou, National of Burkina Faso.