Can I get a three-month visa for Thailand from the consulate in Savannaketh, Laos, while living on a long-term non-immigrant O visa?

Hi everybody. Im living in Thailand on. Long term non immigrant O visa but left due to the catastrophic air pollution arround Chiang Mai to Indonesia. My visa expires on 10th April and I might not be able to return within my three month absence due to my health condition. I have been told that the Thai consulate in Savannaketh - Laos is issuin three month visas which would enable me to apply for a non immigrant O visa long term in Thailand again. Can anybody confirm this or tell me where to get a three month entry to Thailand? Im German of origin.

Thank you for your time and helpful advise