Avanse Financial Services Ltd., an Indian education financing provider backed by private equity firm Warburg Pincus, is considering delaying its initial public offering as demand for loans slows due to stricter US visa rules, according to people familiar with the matter.The Mumbai-based company might wait for the overseas loan market to improve before resuming work on the potential share sale, the people said, asking not to be identified because the information is private. Deliberations are ongoing and no final decision has been made, the people said.A representative for Avanse didn’t respond to requests seeking comment, while Warburg Pincus declined to comment.Avanse provides financing to students at more than 1,650 educational institutions in about 50 countries, offering customized loa