On May 8, 2018, Osuna was arrested by Toronto police and charged with assault. He allegedly assaulted Alejandra Roman Cota, the mother of his 3-year-old son. Roman Cota was visiting Toronto with their child. She returned to Mexico shortly afterward and refused to return to Toronto. Due to Roman Cota's refusal to testify, the prosecution withdrew the charge against Osuna in exchange for a peace bond, mandating that for one year he not have contact with the alleged victim.[46][54] He was placed on administrative leave by MLB commissioner Rob Manfred.[55] On June 22, he received a 75-game suspension without pay for violating the league’s domestic violence policy, retroactive to May 8.[56]