Does Teferi Time Raveler Stop Cascade?

Teferi has a static ability which states that each opponent can cast spells only any time they can cast a sorcery.

Does Teferi stop Cascade?

So the Supreme Verdict is yes, Teferi stops Cascade cold.

Does Cascade ignore timing restrictions?

Timing restrictions based on the card's type (such as creature or sorcery) are ignored. ... If you cast another card with cascade this way, the new spell's cascade ability will trigger, and you'll repeat the process for the new spell.