On 15 March 2019, along with several members of the Bangladesh test team, he was moments from entering the Al Noor mosque in Christchurch, New Zealand when a terrorist attack began. All members of the team were "deeply affected". Mustafizur went on to get married on 22 March. Mustafizur's brother was hopeful that marriage could help him "overcome the shock" of witnessing the attack in New Zealand.