Chord charts. (Link at bottom) The Chords are different on a 3 string Guitar.  The standard tuning for a 3 string guitar is “Open G”  as such I have found these chord charts.  They were made by someone else.  Their website and contact details are included.  We are a sharing community which is great. I have combined them in to one pdf for you to look at download and print.  Any questions e mail me gordon@www.slideguitar.co.uk. combined-chords