12.South-East Asian Games
Ngee Ann Polytechnic, Singapore
June 1-5, 1983
Quarterfinals
| 1983-06-01 | 45kg | Nelson Jamili | PHI | Ismail bin Besar | BRU | KO 1 |
| 1983-06-01 | 45kg | Narayanasamy Subramaniam | SIN | Nid Namwang | THA | PTS |
| 1983-06-01 | 48kg | Leopoldo Serrantes | PHI | Vijayan Subramanian | MLZ | PTS |
| 1983-06-01 | 48kg | Myint Soe Lay | BUR | Rahman Halim | BRU | RSC 1 |
| 1983-06-01 | 48kg | Johny Asadoma | INA | Somasundaram Chandran | SIN | PTS |
| 1983-06-01 | 51kg | Efren Tabanas | PHI | Samai Maluleem | THA | PTS |
| 1983-06-01 | 54kg | Wim Sapulette | INA | Tun Oo | BUR | PTS |
| 1983-06-01 | 57kg | Sukhum Nobnom | THA | Alex Wassa | INA | PTS |
| 1983-06-01 | 60kg | Zaw Latt | BUR | Ganesan Murugesu | MLZ | KO 2 |
| 1983-06-01 | 60kg | Thomas Lim | SIN | Bungsu bin Piut | BRU | PTS |
| 1983-06-01 | 63,5kg | Adi Suwandana | INA | Alias bin Rahman | BRU | KO 1 |
Semifinals
| 1983-06-02 | 45kg | Wahab Bahari | INA | Kyaw Han | BUR | PTS |
| 1983-06-02 | 45kg | Nelson Jamili | PHI | Narayanasamy Subramaniam | SIN | RSC 3 |
| 1983-06-03 | 48kg | ??? | ??? | Leopoldo Serrantes | PHI | ??? |
| 1983-06-03 | 48kg | ??? | ??? | Myint Soe Lay | BUR | ??? |
| 1983-06-02 | 51kg | Murgan Kathirasan | SIN | Mohd Nasori | INA | RSC 3 |
| 1983-06-02 | 51kg | Efren Tabanas | PHI | Adi Duraman | BRU | RSC 1 |
| 1983-06-03 | 54kg | Wangchai Pongsri | THA | ??? | ??? | ??? |
| 1983-06-03 | 54kg | Tan Leong Kok | SIN | Wim Sapulette | INA | PTS |
| 1983-06-02 | 57kg | Leopoldo Cantancio | PHI | Zaini Rahman | BRU | RSC 1 |
| 1983-06-02 | 57kg | Sukhum Nobnom | THA | Ramaswamy Rathakrishnan | SIN | PTS |
| 1983-06-03 | 60kg | Mika Tobing | INA | Rahon Sumagkamernd | THA | ??? |
| 1983-06-03 | 60kg | Zaw Latt | BUR | Thomas Lim | SIN | RSC 2 |
| 1983-06-02 | 63,5kg | Adi Suwandana | INA | Patricio Gaspi | PHI | RSC 2 |
| 1983-06-02 | 63,5kg | Dhawee Umponmaha | THA | Ng Tong Chye | SIN | KO 2 |
| 1983-06-02 | 67kg | Samruay Mongsong | THA | Francisco Lisboa | INA | PTS |
| 1983-06-03 | 71kg | ??? | ??? | Minarto | INA | ??? |
| 1983-06-03 | 71kg | ??? | ??? | Yusof Ismail | BRU | ??? |
| 1983-06-02 | 75kg | Jonas Giay | INA | Ismail Ali | BRU | PTS |
| 1983-06-03 | 81kg | K.Krishnan | SIN | Eduardo Atarin | INA | KO 1 |
| 1983-06-03 | 81kg | Panya Sornnoi | THA | Hock Singh Amarjit | MLZ | PTS |
Finals
| 1983-06-05 | 45kg | Nelson Jamili | PHI | Wahab Bahari | INA | RSC 2 |
| 1983-06-05 | 48kg | Johny Asadoma | INA | Mayedoror Wansuradej | THA | PTS |
| 1983-06-05 | 51kg | Efren Tabanas | PHI | Murgan Kathirasan | SIN | PTS |
| 1983-06-05 | 54kg | Wangchai Pongsri | THA | Tan Leong Kok | SIN | PTS |
| 1983-06-05 | 57kg | Leopoldo Cantancio | PHI | Sukhum Nobnom | THA | PTS |
| 1983-06-05 | 60kg | Zaw Latt | BUR | Mika Tobing | INA | PTS |
| 1983-06-05 | 63,5kg | Dhawee Umponmaha | THA | Adi Suwandana | INA | KO 2 |
| 1983-06-05 | 67kg | Samruay Mongsong | THA | Mohamed Mukhlis | SIN | KO 3 |
| 1983-06-05 | 71kg | Raymundo Suico | PHI | Boonthom Sirakorn | THA | PTS |
| 1983-06-05 | 75kg | Jonas Giay | INA | Charlee Maluleem | THA | PTS |
| 1983-06-05 | 81kg | Panya Sornnoi | THA | K.Krishnan | SIN | PTS |
| 1983-06-05 | +81kg | Lodwyk Akwan | INA | Anan Inkanket | THA | PTS |