Thinking about this (purely academically).
The tail strike limit (oleo's compressed) doesn't change and for an A321 is 9.7 degrees.
The clearance is the 9.7 minus pitch attitude after flare.
Since the flare in flap 3 is more of a check and the final pitch attitude from memory slightly lower. I think there is the answer. A tiny bit more clearance. Marginal though.