Yes, prune it off. On any multi-stem tree/shrub you decide how many stems/trunks you want. Some cultivars of Serviceberry can be single stem or multi-stem.

What would the reason be for pruning? It looks weird or you want to put something there? The plant is fine and is not being harmed.

Dan

I would want to remove it as well. Be prepared though,it will want to sucker once you remove it.

let me clarify what the heck they are saying ...

if there is no other reason to prune it off.. then DONT ...

there is no reason to do it but aesthetics ... you dont like the way it looks

it appears to me that it hasnt bothered you for a decade.. why now???

DONT fix what aint broke.. unless you have an ulterior reason

sooo .. why do you want to go making work for yourself???

ken

What we are talking about is quite subjective. Technically the tree is OK, and even if it did fall over at some distant point it would fall away from the house. Some folks like a "natural" look, some folks like everything perfect and controlled. To me, multi-stemmed amelanchier looks better as "natural" (imperfect) as it lends a unique character to the plant. I would say go with what YOU like.
hortster

Thank you for the feedback. I asked the question because I thought that the tree was supposed to be pruned. I am glad that I have the option of pruning or not pruning. I do not really plant under the tree so I may just leave it. Thanks again.

Excellent. I think it gives the plant much character.

Dan