E 3/D
The E 3 chord consists of the E (Perfect unison) and G# (Major third) notes, with D as the bass note.

How to play the E 3/D chord
- Play D as the lowest bass note in the left hand
- Find E (Root) on the piano keyboard
- Add G# (Major third) — 4 semitones above E
- Press all 3 notes simultaneously to sound the E 3/D chord