uncompassionate

/ʌnkəmˈpæʃənət/
adjective
  1. Not feeling or showing sympathy and concern for others; lacking compassion.
    • The manager's uncompassionate response to the employee's illness upset the whole team.
    • The uncompassionate treatment of refugees drew criticism from human rights groups.
    • It is hard to trust someone who seems so uncompassionate toward others' struggles.