The third edition of the Brazilian Synchrotron School: “Fundaments and Applications” will take place between July 15th and 26th, 2019, at the Brazilian Synchrotron Light Laboratory (LNLS) in Campinas, SP. The School aims to increase the capabilities of the current LNLS user community, as well as to promote the training of new users, which have the potential to use synchrotron light techniques in their research areas. The two-week event will be composed by theoretical and practical classes, lectured by LNLS researchers.