No! The rabies shot should always be given separately from the other vaccines as it can cause a serious reaction. Some vet techs (and even vets) aren't that familiar with how to treat toy breed dogs. The lepto vaccine is a perfect example. Many vets automatically give Yorkies, Maltese, etc. the 5 in 1 vaccine that contains lepto without realizing that lepto can be deadly for toy breeds.
Good for you for asking before allowing your vet to go ahead with it!