I couldn't eat it, that is for sure. Nor marvellous maple syrup. Sigh.
It depends on how strict your diet is/how bad your insulin resistance is?
I have friends who are diagnosed in the lower end of prediabetes, and I would suggest to them that they use small amounts of maple syrup, agave syrup, honey, for baking for their families, and portion control themselves on it. And, of course, eat and meter. Test their carb tolerance and those kind of sweeteners that way. It might be that they can keep a steady healthy BG whilst eating small amounts of this kind of sweetener?