That doesn’t look intentional, I would call the counter people Monday and see what a replacement wall cap will entail. Is there a gc overseeing or will you be responsible for the costs

Yes, we are calling counter people to see about a piece. No we are not responsible for cost to fix. I do have a concern the fix might be visible, having tiles replaced and the removal of the marble cap.

Great, if you aren’t responsible than I see no reason why it can’t be accomplished with no evidence of the repair.

Post a picture standing back farther please. If it isn't going to leak, the cure may be worse than the disease.

@HALLETT & Co. & @Joseph Corlett, LLC, thanks. So, it comes down to faith in the subs to fix it right and is it worth the risk.

I'll be at the house tomorrow and will get some better pictures.

I think I would have had them put the side piece out further so that the ledge from the cap is inside the shower, not outside. It can be useful inside. Then a 3" piece could be used in between the door and the side piece so they can meet in a more intentional looking way. At a minimum the side piece should be in the center of the cap, and there's no reason not to place it even further out. That's the way we had our glass done on the three bathrooms we remodeled that had shower glass.