Display Screen or Portion Thereof with Icon

FIG. 1 is a front view of a display screen or portion thereof with icon showing my new design; and,

FIG. 2 is an enlarged view of the icon of FIG. 1 , shown separately for clarity of illustration.

The outer perimeter illustrated by a pair of dashed broken lines in the drawings illustrates a display screen or portion thereof and forms no part of the claimed design. The dot-dash broken lines in the drawings define the boundaries of the claimed design and form no part thereof.