Display Screen or Portion Thereof with Graphical User Interface Including an Alarm Signal

FIG. 1 is a front view of a display screen or portion thereof with a graphical user interface including an alarm signal, showing the new design;

FIG. 2 is a second embodiment thereof; and,

FIG. 3 is a third embodiment thereof.

The outermost broken line depicting a display screen forms no part of the claimed design. All other broken lines depicting portions of the graphical user interface form no part of the claimed design.