Compared to a major scale, what mode starts on scale degree three? I think it is minor but I do not know.
The mode that starts on scale degree three of a major scale is the Phrygian mode. It differs from the minor mode in that the second scale step is only a half tone above the tonic, rather than a whole tone. In a way, it's more minor than minor.
Here's an example of music in the Phrygian mode: O Virtus Sapientiae, by Hildegard of Bingen: