I don't think so, but this is kind of a grey area. "Committed to" a ranked D3 school (Wash U is ranked 5th nationally) is a minimum 5.5 according to the guidelines, but "verbal commitment" is a term usually used in context of scholarships, which would only apply to D1. If "verbal commitment" is defined narrowly to mean "verbally committed to taking a scholarship at a D1 school", then this kid is technically a minimum 3.5 according to the guidelines.
Regardless, quite frankly, a 3-star senior recruited by a top 10 D3 school in this area would have no business at all playing 4.5. We're seeing this high school nonsense filter into 4.0 this year around here, and I don't like it one bit. I hope your league or section coordinator puts the kibosh on this idea.