These proceedings contain papers presented at the 3rd IFAC Symposium on Intelligent Autonomous Vehicles held in Madrid, Spain. The aim of the symposium was to present and discuss research and development on advanced applications in the field of land-based marine and aerospace intelligent autonomous vehicles. The papers describe not only new methods and technologies on solving classic problems related with intelligent autonomous vehicles, but also new approaches to their design, such as new architectures, topological navigation and self-learning systems.