| Games: | World Aquatics Championships |
| Nf: | BRU |
| Nfname: | Brunei Swimming Federation |
| Year: | 2017 |
| Flagcaption: | Flag of Brunei |
| Location: | Budapest, Hungary |
| Competitors: | 2 |
| Sports: | 1 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
| App Begin Year: | 2009 |
Brunei competed at the 2017 World Aquatics Championships in Budapest, Hungary from 14 to 30 July.
See main article: Swimming at the 2017 World Aquatics Championships. Brunei had received a Universality invitation from FINA to send two male swimmers to the World Championships.[1]
| Athlete | Event | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | |||
| align=left rowspan=2 | Muis Ahmad | Men's 50 m breaststroke | 30.73 | 64 | did not advance | |||
| Men's 100 m breaststroke | 1:08.10 | 66 | did not advance | |||||
| align=left rowspan=2 | Christian Nikles | Men's 50 m freestyle | 24.71 | 93 | did not advance | |||
| Men's 100 m freestyle | 55.05 | 85 | did not advance | |||||