It is a rhetorical figure that consists of denying or suppressing what is really meant. It is a rhetorical figure that consists of not expressing everything that you want to imply without ceasing to be understood by the listener. Understand the intention of what the speaker is going to say.
It is a variant of lithote (rhetorical figure).
It is a rhetorical figure associated with the irony and the euphemism, through which says something, diminishing or denying