Open Suspended Chords
You’ll see either sus or sus4 (same thing) as in Asus or Asus4, as well as Asus2. Sus/sus4 chords have the following intervals – root, 4rd and 5th. Sus2 chords have root, 2nd, 5th (no 3rd). If you don’t understand this right now, don’t worry you will learn it during the beginner course! There’s no open G sus chord.