You can find several free Telugu versions of Rukmini Kalyanam
Offers the Rukmini Kalyanam: Bhagavata Gananadhyayi , which includes the story as part of Potana's Telugu Bhagavatam. rukmini kalyanam in telugu book free link download
While I cannot provide a direct download link here due to copyright and policy restrictions, I can guide you to where you can legally download or read the Rukmini Kalyanam in Telugu book for free . You can find several free Telugu versions of