Sure, but in toxicology suspicion is a little more well defined than that; although with the precautionary principle creeping its way in every nook and cranny of the EU regulatory bodies, you'd never know it.
A suspected carcinogen is a substance that can cause cancer in experimental animals but for which there are no indication that it causes cancer in humans (which means that actually there is positive evidence (exposure but no cancer) rather than negative (no exposure, so we have no idea).
Same with a suspected developmental toxicant - enough evidence to label it, not enough to decide that it is a definite developmental toxicant in humans.
Such substances can be declassified though; if there is enough evidence that shows that the effect, although seen in animals, will not, or only under very special circumstances occur in humans.
A simple and not uncommon example is certain kidney effects in (male) rats. A fair number of substances can trigger these, but the effect is specific to rats, so this finding nowadays has no effect on the hazard and risk assessment for humans.
Henk