| Conflict: | Oddusuddan offensive Operation Unceasing Waves III |
| Partof: | the Sri Lankan civil war |
| Date: | Oct – Nov 1999 |
| Place: | Sri Lanka |
| Result: | Tamil Tigers victory |
| Combatant1: | Military of Sri Lanka |
| Combatant2: | Liberation Tigers of Tamil Eelam |
| Commander1: | Unknown |
| Commander2: | Unknown |
| Strength1: | Unknown |
| Strength2: | Unknown |
| Casualties1: | 800 killed, wounded or missing[1] |
| Casualties2: | Unknown |
The Oddusuddan offensive was a military operation in which the Tamil Tigers captured Oddusuddan from the Sri Lankan Army. They were also believed to have captured large amounts of weapons and ammunition as well as armoured vehicles[1] during the operation. The offensive was part of Operation Unceasing Waves III.