Asus4 is the A suspended 4 chord. Its notes are A, D and E. The fourth replaces the third. Resolve it down to the third for a familiar release.
How to play Asus4
Open shape
x02230
Barre chord
fret 5, E shape
577755
Barre tip: the long bar marked BARRE means one finger presses several strings at once. Lay it flat just behind the fret, press with the bony outer edge rather than the soft middle, and keep your thumb behind the neck. Pick each string one at a time and nudge the finger until none of them buzz.
Numbers show frets from the low E string to the high e string; x means don't play that string.
What's in Asus4
A1
D4
E5
Formula
1 · 4 · 5
Also written
Asus4, Asus
Chord type
Suspended 4
Asus4 notes across the neck
Every A, D and E on the first 12 frets. The filled dots are the root, A. Build your own shape from any nearby group.