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My wife is currently working as a teacher. Can I say that she wants to get some experience as a teacher and also wants to study further which helps her to enhance her teaching skill. Moreover can I use employment bond in this matter?No don't lie. Stating a medical reason would be a lie. Just explain simply that "My spouse cannot and will not be accompanying me at this time". If your spouse is currently employed in your home country. Just state "He/she will be remaining in our home country and continuing in his/her employment at so-and-so'. Don't give a hard reason that could be a lie, and don't write it in a way that makes the employment seem as the reason for him/her not accompanying you - just state facts.