No. Even if oligospermia is extreme, sperm are always found on the semen analysis or seminogram. In contrast, in Azoospermia there are no sperm in the ejaculate.
In order to achieve a pregnancy with Azoospermia, it is necessary to do a testicular biopsy to see if it is possible to obtain sperm from the testicle directly. If this is not possible, there is only the option of using a sperm donor to become a father.