Hide Repeating Subform

I have a nested subform inside a repeating subform (Q1). I would like to be able to click a button and hide all instances of the nested subforms. It is named Subform3.

I tried this script:

LPA.FormButtons.HideButtons::click - (JavaScript, client)

this.resolveNode("Q1[*].Subform3[*]").presence = "hidden";