|Date of birth||19 November 1945|
|Place of birth||Bucharest, Romania|
|Height||1.76 m (5 ft 9 in)|
|1973–1974||Olimpia Satu Mare||25||(3)|
|1980–1982||Ceahlăul Piatra Neamț|
|1988–1990||Steaua București (assistant)|
|1990–1991||Romania Olympic team|
|1991–1992||Dacia Unirea Brăila|
|1992–1993||Steaua București (assistant)|
|2006–2008||Prefab Moldelu (technical director)|
|2010||Steaua II București (technical director)|
|* Senior club appearances and goals counted for the domestic league only|
Dumitru Dumitriu (born 19 November 1945 in Bucharest), commonly known as Țiți Dumitru or Dumitriu III, is a retired Romanian footballer and coach. He is the younger brother of Emil Dumitriu (Dumitriu II) who was an International footballer and champion of Romania with Rapid București and the elder brother of Constantin Dumitriu (Dumitriu IV) who won the Romanian championship with Steaua București.
He played as a youngster for Rapid București before beginning his senior career at CS Târgoviște. After a year he moved to ASA Târgu Mureș, where he played for 4 years. In 1968, he signed with Steaua București, where he played until 1972, when he returned to Rapid. He also played for Olimpia Satu Mare, FCM Galați and for ICSIM București.
He won a cap for the Romania national football team.
After he quit playing in 1977, he became quickly a player/manager for ICSIM București, amongst others in the beginning he managed lower league teams to gain more experience like Rapid Fetești, Autobuzul București, Steaua Mizil, and Rulmentul Bârlad.
The highlight of his career as a manager was with Steaua Bucureşti, qualifying them three times in a row in the UEFA Champions League and also winning Divizia A in 1995, 1996, 1997 and 2005. Plus two Romanian Cup titles in 1996 and 1997, and a Romanian Supercup title in 1995.
- Steaua București
- Romania Olympic
- Nehru Cup (1): 1991
- Steaua București
- Romanian League (4): 1994–95, 1995–96, 1996–97, 2004–05
- Romanian Cup (2): 1995–96, 1996–97
- Romanian Supercup (2): 1994, 1995
- Rocar București
- "Remember. Hunedoreni la Campionatele Mondiale de fotbal (IV)" [Remember. Hunedoreni at the World Football Championships (IV)] (in Romanian). gazetadedimineata.ro. Retrieved 8 October 2017.
- "INTERVIU/ Nichi Dumitriu, fosta glorie a Rapidului: "Copos m-a ofertat să vin în Giuleşti pe un salariu de 100 pe euro"" [INTERVIEW / Nichi Dumitriu, the former glory of Rapid: "Copos offered me to come to Giulesti on a salary of 100 euro"] (in Romanian). adevarul.ro. Retrieved 8 October 2017.
- "Fotbaliştii care au creat istoria clubului STEAUA BUCUREŞTI" [The football players who created the history of STEAUA BUCHAREST] (in Romanian). fcsteaua.ro. Retrieved 8 October 2017.