A lockout device for a handle assembly includes first and second lockout members each including an outward facing base wall and outward extending first and second projections. The first and second projections of the first base member are spaced apart to receive the handle therebetween, and the first and second projections of the second base member are spaced apart to receive the handle latch therebetween. The first and second lockout members are pivotable with respect to each other to a lockout position for engagement of the base walls of the first and second lockout members with facing surfaces of a handle and a handle latch of the handle assembly. When the first and second lockout members are secured between the handle and the handle latch in the lockout position, the first and second lockout members block movement of the handle latch to prevent rotational movement of the handle assembly.