Thanks to Justin for the heads up.
UPDATE: Confirmed by lead actress Priyanka Chopra.
@SpoilerTV reports #Quantico moving to Sundays at 10|9c first
@priyankachopra http://t.co/Fl11F0N2EW @QuanticoTV
— Nirat (@NiratAnop) June 2, 2015
Yes it is! @NiratAnop @SpoilerTV
— PRIYANKA Aka Ayesha (@priyankachopra) June 2, 2015
ABC has changed its schedule according to its website. Of Kings and Prophets is now slated as 'Coming Soon' whilst Quantico seems to have moved to Sundays at 10, nothing currently has filled the Tuesdays at 10 timeslot. We'll update as we receive more information.