Sri Lanka at the 2018 Summer Youth Olympics
Sri Lanka participated at the 2018 Summer Youth Olympics in Buenos Aires, Argentina from 6 October to 18 October 2018.
Sri Lanka made its Youth Olympics debut in three sports it qualified in: archery, basketball and gymnastics. Sri Lanka also made its Youth Olympics debut in the sport of shooting.
Parami Wasanthi Maristela won Sri Lanka's first ever Youth Olympics medal, a bronze in the girls' 2000 metre steeplechase athletics event.
Competitors
The following is the list of number of competitors participating at the Games per sport/discipline.| Sport | Men | Women | Total |
| Archery | 1 | 0 | 1 |
| Athletics | 2 | 2 | 4 |
| Badminton | 0 | 1 | 1 |
| Basketball | 0 | 4 | 4 |
| Gymnastics | 0 | 1 | 1 |
| Shooting | 1 | 0 | 1 |
| Swimming | 1 | 0 | 1 |
| Total | 5 | 8 | 13 |
Medalists
Medals awarded to participants of mixed-NOC teams are represented in italics. These medals are not counted towards the individual NOC medal tally.| Medal | Name | Sport | Event | Date |
| Badminton | Mixed teams | 12 October | ||
| Athletics | Girls' 2000 metre steeplechase | 15 October |
Archery
Sri Lanka qualified one archer based on its performance at the 2017 World Archery Youth Championships.;Individual
;Team
Athletics
Sri Lanka qualified two athletes. On the first day of the Asian trials held in Bangkok, Thailand, Sri Lanka won two quotas. Dilan Bogoda took first place in the boys' 400 metres event, while Parami Wasanthi Maristela won the 2000 metres steeplechase in a world leading team to qualify. On the second day of trials, high jumper Seniru Amarasinghe qualified in second place with the third ranked jump in the world, while sprinter Shelinda Jansen qualified in third position.;Track & road events
- Total refers to the placement of round 1 added to the placement in round 2 in the women's 2000 m steeplechase event. The second round will be held as part of the cross-country race.
Badminton
Sri Lanka qualified a girl's quota after it was reallocated to the country from an unused tripartie commission universality spot.;Girl
;Team
Basketball
Sri Lanka qualified a girl's basketball team of four athletes. This marked the country's debut in the sport at the Youth Olympics.Girls' tournament
;Skills CompetitionGymnastics
Artistic
Sri Lanka qualified one gymnast based on its performance at the 2018 Asian Junior Championship.;Girls
;Individual Qualification
[Gymnastics at the 2018 [Summer Youth Olympics – Mixed multi-discipline team|Multidiscipline]]
Shooting
Sri Lanka received a reallocated spot in the boys' 10 m air rifle event.;Boys
;Individual
;Team
Swimming
Sri Lanka qualified one male swimmer. Akalanka Peiris met the A or B standard times for all of his events.;Boy