Created a form-fitting Amazon Alexa Echo Dot 3rd Gen Wall Mount. I wasn't too impressed with the aesthetics of the other ones available, and the couple that looked nice looked far too fragile for my tastes.
This design only holds the Echo Dot from the bottom; it's form-fitting design helps cradle it, but I would only recommend using this somewhere you'd consider stable and relatively disturbance free;
It includes a chamfered screw hole but I'm sure a command strip or two could hold it up.
Designed explicitly for the 3rd-gen Echo Dot- I have a 2nd-gen one too and it's definitely a different size.
Including two versions: The one depicted in the photos is the standard version, but I've included a thicker version too.