The ornamental design for a displayscreen or portion thereof with graphical user interface, as shown and described.
FIG. 1 is a front perspective 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 perspective view of a second embodiment of a display screen or portion thereof with graphical user interface, showing our new design; and,
FIG. 3 is a front perspective view of a third embodiment of a display screen or portion thereof with graphical user interface, showing our new design.
The outermost perimeter illustrated by a pair of dashed broken lines represents display screens or portions thereof and forms no part of the claimed design. The remaining dashed broken lines illustrating portions of the graphical user interface form no part of the claimed design.