The ornamental design for a displayscreen or portion thereof with graphical user interface, as shown and described.
FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with graphical user interface showing our new design;
FIG. 2 is a front view of a second embodiment of a display screen or portion thereof with graphical user interface showing our new design;
FIG. 3 is a front view of a third embodiment of a display screen or portion thereof with graphical user interface showing our new design; and,
FIG. 4 is a front view of a fourth embodiment of a display screen or portion thereof with graphical user interface showing our new design.
The outer perimeter shown in broken lines in the drawings illustrates a display screen or portion thereof and forms no part of the claimed design. The remaining broken lines in the drawings illustrate portions of the graphical user interface that form no part of the claimed design.