I'm playing the prelude in Bach's d-minor suite. My teacher and I were wondering what the third to last chord is. We didn't find that A, E and D form a chord, but do they? Is the D maybe a "queuing" note that resolves to the C#? We found that this chord was the climax of the phrase and that's maybe because it is so exotic. (My mother language is Icelandic so don't hit me) 

All info is appreciated.
![The chord circled](https://i.stack.imgur.com/bQwXI.png)