The III International Workshop on Proximity Data, Multivariate Analysis and Classification will take place during October, 26-27, 2017 in Valladolid (Spain). It is organized by the Multivariate Analysis and Classification Spanish SEIO Group AMyC (http://amyc.seio.es/). AMyC is a Working Group of more than 50 researchers from all the Spanish universities. Every year, the Working Group organizes a meeting to promote the communication among its members and between them and other researchers, and to contribute to the development of the Multivariate Analysis and Classification field and related problems and applications. 