This book constitutes the proceedings of the Third Future Internet Symposium, FIS, held in Berlin, Germany in September 2010.The aim of this symposium was to bring together scientists and engineers from academia and industry and from various disciplines to exchange and discuss their ideas, views, and research results towards a consolidated, converged and sustainable future internet. The 16 revised full papers presented were carefully reviewed and selected from numerous submissions. The papers cover a wide range of topics such as future internet architectures and protocols; semantic technologies; and internet of services, things and content.