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

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

FIG. 2 is a front view of a second embodiment thereof; and,

FIG. 3 is a front view of a third embodiment thereof.

The outermost broken line depicting a display screen in FIGS. 1 through 3 forms no part of the claimed design. All other broken lines depicting portions of the graphical user interface also form no part of the claimed design. The solid black surface shading in FIG. 3 indicates a contrast in appearance.