What note is located at the 3rd fret of the 2nd string?

The note located at the 3rd fret of the 2nd string is D.

To understand why, it’s important to know that the 2nd string on a standard-tuned guitar is the B string. The notes on the B string are as follows, moving up the frets:

• Open string (0th fret) is B

• 1st fret is C

• 2nd fret is C#

• 3rd fret is D

Thus, when you press down on the 3rd fret of the 2nd string (B), you are playing D. This systematic approach of naming the notes along the fretboard, based on half steps, helps in mastering the fretboard and understanding note locations effectively.