S3, S-3 or S03 may refer to:
==Entertainment== Si3 (film), originally titled S III and also known as Singam 3, the third film in the Singam franchise Expedition to the Barrier Peaks, code S3, a 1980 Dungeons & Dragons adventure module S3 Plan, a fictitious program in the Metal Gear Solid 2: Sons of Liberty video game SABC 3, South African public television channel, stylised as S3
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).