According to the official FAQ on non-immigrant visas: Yes, one can apply early to renew, and yes it can be rejected inasmuch as it will be a new application. Below is the quote of the relevant part of the afore-mentioned page:
Q: I have a nonimmigrant visa that will expire soon and I would like to renew it. Do I need go through the whole visa application process again?
A: Yes, you will have to go through the whole visa application process each time you want to apply for a visa, even if your visa is still valid. There are some situations where a visa applicant may not need to be interviewed when renewing his/her visa. See the U.S. Embassy or Consulate website for more information.
Disclaimer: I am not an expert, I simply googled the information.
Credit:stackoverflow.com‘
4 Mar, 2024
5 Mar, 2024
5 Mar, 2024