Banjo Fsus4 chord (Sawmill)F suspended 4th on the 5-string banjo: 3 3 0 3, and 5 more shapes

Frets, string 4 to string 1: 3 3 0 3 (open position)

1. String 4 (D): 3rd fret, index finger, F
2. String 3 (G): 3rd fret, middle finger, B♭
3. String 2 (C): open, C
4. String 1 (D): 3rd fret, ring finger, F
5. String 5, the short g: open, G, not in the chord

Sounds: F B♭ C F  ·  Fsus4 is F, B♭, C (1 · 4 · 5)

The 5th string: the short g adds the 9th over Fsus4, a colour rather than a clash.

Sawmill tuning: gDGCD, the short 5th string first, then strings 4 to 1.