Usually no, unless the marinade is clearly mild and the meat was not sitting in it long, because many carniceria marinades already carry enough salt for the final cook.
Short answer first
The best next move is usually the one that keeps should you salt marinated meat again before cooking connected to the real dish, crowd size, or shopping decision in front of you instead of turning it into a vague kitchen rule.
Usually no, unless the marinade is clearly mild and the meat was not sitting in it long, because many carniceria marinades already carry enough salt for the final cook.
That short answer works best when it stays attached to the way the food will actually be cooked, served, or stored.
Most answers around should you salt marinated meat again before cooking change with thickness, timing, temperature, and how much of the meal is already doing the heavy lifting.
A useful answer should reduce guesswork, not pretend every kitchen and every counter tray behave the same way.
If you still feel unsure, the best next move is usually one clear follow-up question at the counter or one small test batch at home.
That gives you a real answer much faster than adding more theory.
FAQ
Usually no, unless the marinade is clearly mild and the meat was not sitting in it long, because many carniceria marinades already carry enough salt for the final cook.
The answer changes most when checking seasoning before grilling store-marinated meat is not actually the situation you are cooking for. Thickness, salt level, holding time, and crowd size usually matter more than the label alone.
Skip extra salt by default and taste the first cooked piece. If you are still at the counter, ask one direct question about how the cut or product is usually used.