The commentary on book three is edited by John Sharpe in Sharp, D. 1934. “Simonis de Faverisham Quaestiones Super Tertium De Anima.” Archives dH́istoire Doctrinale et Littéraire Du Moyen Âge 9: 307–68. That edition is only based on the Merton witness. The questions to book three are based on that edition.
View text in SCTA Reading Room: http://scta.lombardpress.org/text/questions/da-242