Watch the Suspended Three online guitar lesson by Brad Carlton from Chord Studies: Beginner Chords Vol. 1
In this example, we'll be looking at the change from Dsus4 to D. That means that the only note that changes is on the first string. As with the other examples dealing with suspended fourths, be sure that you sound all the notes clearly so that you can hear the changing chord quality. Also be mindful of the strings marked with x's so that you don't strum them.