When To Start Cutting Lower Branches On A Seedling Maple Tree

Question

started as seedling two years ago, about two/three feet tall now

Answer 1

When they die. There is no need to cut them before this.

Maple trees are well adapted to growing on their own without help. Unless they are showing signs of distress, it is best to leave them as they are.

This article will help:

https://www.gardeningknowhow.com/ornamental/trees/maple/growing-maple-trees.htm