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 display screen or portion thereof with graphical user interface showing our new design according to a first embodiment;
FIG. 2 is a front view of a display screen or portion thereof with graphical user interface showing our new design according to a second embodiment;
FIG. 3 is a front view of a display screen or portion thereof with graphical user interface showing our new design according to a third embodiment; and,
FIG. 4 is a front view of a display screen or portion thereof with graphical user interface showing our new design according to a fourth embodiment.
The outer perimeter, illustrated in the figures by broken lines, 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.