A suspended chord can be created by substituting the 4th degree of a chord for the third. For example, a C major chord contains the notes C, E and G, (1, 3 and 5) while a C suspended chord contains C, F and G, (1, 4 and 5). Here are some common suspended chord shapes.
Csus4
Dbsus4
Dsus4
Esus4
Fsus4
F#sus4
Gsus4
Absus4
Asus4
Bbsus4
Bsus4
Ebsus4