Apophasis

Etymology

From Greek "apophasis" (denial), from "apophanai" (to say no): apo- "away from" plus "phanai" (to speak). Also known by the Latin term praeteritio and the Greek paralipsis.

noun · /uh-POF-uh-sis/
Raising a subject by pointedly saying you will not mention it.
What it names
The sly rhetorical move that has it both ways — "I won’t even bring up his bankruptcy" — planting the very idea it pretends to withhold.
Example
Classic apophasis: "I won’t stoop to mentioning my opponent’s three missed votes — that would be beneath this debate."
Related idea
Where a euphemism softens a subject to avoid offense, apophasis names the damaging thing outright while feigning restraint.