This volume contains the proceedings of JELIA '92, lesJourn es Europ ennes sur la Logique en IntelligenceArtificielle, or the Third European Workshop on Logics inArtificial Intelligence. The volume contains 2 invited addresses and 21 selectedpapers covering such topics as:- Logical foundations of logic programming andknowledge-based systems,- Automated theorem proving,- Partial and dynamic logics,- Systems of nonmonotonic reasoning,- Temporal and epistemic logics,- Belief revision. One invited paper, by D. Vakarelov, is on arrow logics,i. e. , modal logics for representing graph information. Theother, by L. M. Pereira,J. J. Alferes, and J. N. Apar cio, ison default theory for well founded semantics with explicitnegation.