Say I'm in a key with a Dm chord, and I play a chord with the notes D E A C
Should I call this Dm7sus2 or D7sus2?
After some brief googling my impression is that most people don't use the name Dm7sus2. They would call this chord D7sus2 whether the underlying key contained a D or Dm chord. I haven't seen a formal explanation though, and I would have thought that Dm7sus2 would be preferable. It accurately implies the underlying key while still specifying not to play the 3rd in the chord.