Athletics at the 2008 Summer Olympics – Men's 800 metres Semifinal 3 Semifinal 3

| Rank_ | Lane | Athlete | Country | Time_ |
|---|---|---|---|---|
| 1 | 2 | Nabil Madi | Algeria | 1:45.63 |
| 2 | 4 | Gary Reed | Canada | 1:45.85 |
| 3 | 5 | Boaz Kiplagat Lalang | Kenya | 1:45.87 |
| 4 | 9 | Manuel Olmedo | Spain | 1:45.91 |
| 5 | 3 | Belal Mansoor Ali | Bahrain | 1:46.37 |
| 6 | 8 | Michael Rimmer | Great Britain | 1:48.07 |
| 7 | 7 | Abraham Chepkirwok | Uganda | 1:49.16 |
| 8 | 6 | Abubaker Kaki | Sudan | 1:49.19 |