Location: South India
looks like injured species, unable to stand.
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Well, after a lot of research, I hardy believe that it is a Rhizotrogus aestivus. First of all, the size (2-3cm) you mentioned fits exactly. Secondly, the colour matches fair enough. Finally the antennas and the body shape, may not be seen very well in the picture but I assume that they match. The only thing that I am not sure is the "laziness" of that insect, beacause they are only lazy or clumsy and not active, only when they are about to die.
For more informations check here: https://inpn.mnhn.fr/espece/cd_nom/10907?lg=en