Oyster sauce
Top 3 in Top 8 Best Fish Sauce Substitutes
Due to its comparable savory flavor to fish sauce, the oyster sauce may easily be used in place of it in most stir-fry recipes. Oyster sauce is a little bit thicker, therefore it wouldn't work well in meals that call for fish sauce's delicate consistency. One choice is to dilute down oyster sauce by adding a little water.
Oyster sauce can be used in lieu of fish sauce in stir-fries, fried rice, and marinades at a ratio of 1 to 1, but be aware that the flavor will be richer. While fish sauce is free of sugar, some brands have as much as 4 grams per tablespoon (15 mL). Cheaper oyster sauce products could also include caramel color, a potentially cancer-causing chemical.
