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 my new design;
FIG. 2 is an enlarged view of the icon shown in FIG. 1, shown separately for completeness of illustration; and,
FIG. 3 is another front view thereof in a display screen environment.
The outer perimeter illustrated by a pair of dashed broken lines illustrates the display screen or portion thereof and forms no part of the claimed design.
The dot-dashed lines define the boundary of the claimed design and form no part of the claimed design.
The remaining dashed broken lines shown in the drawings illustrate portions of the graphical user interface that form no part of the claimed design.