SL-COMP is a competition bringing together researchers and users interested in automated reasoning methods for separation logic (SL). The competition provides a snapshot of the state of the art in the area through a set of problems that put forward the strengths and challenges of the existing solvers and a comparative and replicable evaluation of participating solvers. The third edition of SL-COMP took place in April 2019, as part of the TOOLympics event at TACAS 2019. It collected more than 1K satisfiability and entailment problems, had seen the adoption of the new input format based on SMT-LIB and had doubled the number of participant solvers compared with the first edition in 2014. This report relates the history and the context of SL-COMP competition and accounts of its third edition. It also discusses the issues related with its organization and the challenges for the next editions.