The ornamental design for a displayscreen or portion thereof with graphical user interface, as shown and described.
The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee.
The FIGURE is a front view of a display screen or portion thereof with graphical user interface showing the claimed design.
The broken lines in the FIGURE show a display screen or portion thereof, and form no part of the claimed design.