Can you cast a spell with suspend during your opponent's turn if the last time counter is removed?

Suspend works by placing time counters on a card in exile and removing one at the beginning of each of its owner's upkeeps. However, time counters can also be removed by other effects (e.g., Clockspinning, Jhoira's Timebug) at any point in the game, including during an opponent's turn.

Under CR 702.62d, when the last time counter is removed from a suspended card — regardless of how or when it happens — the card's controller must cast it immediately if it has a casting cost, or put it onto the battlefield if it doesn't. This triggered ability goes on the stack and resolves, forcing the cast even outside of the normal timing rules.

Crucially, CR 702.62d also states that the spell may be cast 'as though it had flash,' meaning normal timing restrictions are overridden. So even if it's a sorcery, it can be cast mid-combat or on an opponent's turn when the last counter is removed by any means.

Concrete example: Your opponent uses Clockspinning to remove the last time counter from your suspended Ancestral Vision during their main phase. You must immediately cast Ancestral Vision, even though it's a sorcery and it's your opponent's turn — the suspend trigger overrides normal timing.

Note that if the card cannot legally be cast (e.g., no legal targets exist), it stays in exile per CR 702.62d. But if it can be cast, the cast is mandatory, not optional.