Here is the list of topics covered in Course 3:

1. Basics
2. API Design
3. Messaging and Event Handling
4. Consistency vs. Availability
5. NoSQL databases
6. Location Based Databases
7. Monoliths to Microservices Migration
8. Containers
9. WhatsApp System Design
10. Tinder System Design
11. Anomaly Detection
12. Instagram Design
13. Netflix Movie Onboarding
14. Interview Tips
15. Fundamentals
    - Databases Deep Dive
    - Consistency in Distributed Systems
    - Caches Deep Dive
    - Networks Deep Dive
    - Database Replication
    - Database Migrations
    - Distributed Rate Limiting
    - Security in distributed systems
    - Design an Audio Search Engine like Shazam
    - System Design Tradeoffs
    - Distributed Consensus with Paxos
    - Observability in Distributed Systems
    - InterviewReady Fundamentals Test
16. Low Level Design
    - Building a game engine
    - Single Responsibility Principle
    - Exploring Moves for the AI
    - Don't Repeat Yourself
    - Open-Closed Principle
    - Liskov Substitution Principle
    - Interface Segregation and Dependency Inversion
    - Memory and Code Optimizations
    - Test Driven Changes
    - The Strategy Design Pattern
    - Command and Strategy Patterns
    - High Level Design
    - Design an Emailing service like Gmail
    - Chess Design: Building a highly scalable turn-based gaming website
    - Hotstar: Live Video Streaming Design
    - Google Docs: Collaborative editor design
    - Design a Cab Aggregator App like Uber
    - Design a Location Based Service like Google Maps
    - WhatsApp Calling App
    - Map Reduce and Stream Processing
    - High Level Design Exam
17. Machine Coding
    - Low Level Design: Payment Tracking App like Splitwise
    - Machine Coding a Cache
    - Machine Coding an Event Bus
    - Machine Coding a Rate Limiter
    - InterviewReady LLD Test

This covers all the topics mentioned in Course 3 without missing any. Let me know if you need further details on any specific topic!