Is it normal for my 3 mths old fomula fed child to have super watery dark yellow poo without curd ?

Formula fed babies usually have firmer, pale yellow poo compared to breastfed babies, so watery and dark yellow is worth paying attention to, especially since it is outside the typical range. It could be nothing serious, but it could also point to something like a tummy bug or a formula intolerance, and at 3 months old I would not want to guess. I would bring her to the PD sooner rather than later just to rule things out, because watery stools in a young baby can sometimes lead to dehydration fairly quickly. Better to get a proper check than to wait and see on this one.