In many contexts, Level 3 refers to a deeper or more advanced tier within a system, such as: Networking (OSI Model): Level 3 is the Network Layer, handling routing and IP addressing. Support/Ticketing Systems: Level 3 support involves expert troubleshooting for complex issues. Language Proficiency (CEFR): B1 (Intermediate) is sometimes called Level 3. https://www.accessskills.co.uk/courses/diplomas/level-3/