400m U23 Men, Heat:3 of 4 ; Official result
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 4 | 197 | ARREY Brandon | Blarney/Inniscara A.C. | 49.25 | Q | |||
| 2 | 5 | 183 | WOODS Kevin | Crusaders A.C. | 50.95 | q | |||
| 3 | 3 | 219 | FINN Liam | Nenagh Olympic A.C. | 54.96 | R162.5b | |||
| 4 | 6 | 84 | SHANLEY Eoghan | Lucan Harriers A.C. | 54.98 |