In the the Create multipatch or 3D object features document there is a section that reads:
After the first click, multipatch snapping is enabled automatically. An orange square appears near the pointer when a snap agent is active. Line extensions appear as orange dashed lines and actively combine to snap to inferred intersections.
I understand this to mean that this "multipatch snapping" is a different feature than the "snapping" feature in the edit ribbon. It also seems unaffected by the settings in the ribbon.
I would like to disable "multipath snapping" because for my drawings I need complete accuracy on where the vertexes are and often this right angle or parallel lines snapping makes it impossible.
Create multipatch or 3D Object features—ArcGIS Pro | Documentation
did you try the holding the spacebar tip?
I've tried this as well as playing around with the snapping tolerance settings. It did not change the behavior