| Event: | Men's 150 metre individual medley SM3 |
| Games: | 2020 Summer |
| Venue: | Tokyo Aquatics Centre |
| Dates: | 28 August 2021 |
| Competitors: | 13 |
| Nations: | 10 |
| Gold: | Jesús Hernández Hernández |
| Goldnpc: | MEX |
| Silver: | Ahmed Kelly |
| Silvernpc: | AUS |
| Bronze: | Grant Patterson |
| Bronzenpc: | AUS |
The Men's 150 metre individual medley SM3 event at the 2020 Paralympic Games took place on 28 August 2021, at the Tokyo Aquatics Centre.
The swimmers with the top eight times, regardless of heat, advanced to the final.
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 5 | 3:06.36 | ||||
| 2 | 1 | 4 | 3:06.72 | ||||
| 3 | 2 | 5 | 3:13.08 | ||||
| 4 | 1 | 3 | 3:16.91 | ||||
| 5 | 2 | 4 | 3:18.54 | ||||
| 6 | 2 | 3 | 3:22.05 | ||||
| 7 | 2 | 6 | 3:29.51 | ||||
| 8 | 1 | 6 | 3:45.53 | ||||
| 9 | 2 | 2 | 3:47.52 | ||||
| 10 | 1 | 2 | 4:09.11 | ||||
| 11 | 2 | 7 | 4:17.93 | ||||
| 12 | 1 | 7 | 4:52.88 | ||||
| 13 | 2 | 1 | 5:06.04 |
| Rank | Name | Nationality | Time | Notes | +Men's 150 metre individual medley final | 2:56.99 | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3:02.23 | ||||||||||
| 3:05.57 | ||||||||||
| 4 | 3:15.84 | |||||||||
| 5 | 3:17.44 | |||||||||
| 6 | 3:20.35 | |||||||||
| 7 | 3:28.43 | |||||||||
| 8 | 3:43.75 |