This Third Report on the Integration Priority Project Agenda (API), provided for in the COSIPLAN-IIRSA Work Plan 2013 and intended for submission to the consideration of the UNASUR South American Infrastructure and Planning Council and for the general public, has a twofold objective. On the one hand, it reflects the advancements made this year regarding developments in methodological and IT tools to record and analyze the status of the API projects, and on the other hand, it presents an overall assessment of the progress made by such projects. Thus, the report provides details of the current status of the projects as well as an analysis of their rationale and their potential for creating cross-border synergies to promote sustainable social and economic development through the construction of strategic infrastructure networks.