Verification benchmarks for single-phase flow in three-dimensional fractured porous media

•Presents four benchmark cases for single-phase flow in three-dimensional fractured porous media.•Investigates the capabilities of DFM methods in handling complexities common to fracture networks.•Compares results of 17 different numerical methods, submitted by 11 participating groups.•Is supplemented by a public Git repository containing result data and reproducing Jupyter notebooks.