The DS-160 form which is used for B1/B2 visa applications never actually asks you about deportations or removals from countries other than the US. Therefore your brother would only have to disclose his former transgression if asked so directly during the visa interview. The likelihood of that happening is impossible to estimate accurately, but should that happen the best strategy is to tell the truth. I would also recommend bringing in any documentation related to the deportation from the UK to the visa interview. If the matter comes up you can pull it out and show it. If it doesn’t, even better.
As for whether or not the US knows by default… nobody really knows. While there are in fact numerous data sharing agreements between the Five Eyes countries, there are little details available about how their databases are synchronized and to what extent. Your brother’s former history might show up automatically or it might not. The best strategy is to assume it does show up and be 100% open if they ever question this issue.
Given the country of origin of the visa applicant you will be highly scrutinized and the applicant record double-checked to verify that the claims are true, sorry but at these times being a citizen from certain countries implies a further degree of investigation. Your plan has a high risk of failure. Present all the facts and try to present a strong case that you do not intend to stay or work in the US. Also, request a very short term visa.
In general, the UK and the US partner closely and it’s highly likely that the US will be aware of the UK deportation. If your brother claims he has not been deported, but the US has evidence that he was, the visa will be rejected for lying on the application and it will be very difficult to ever visit the US.
I would advise that he disclose the deportation (if asked) and provide strong evidence that he can afford the trip and intends to return to Bangladesh. Even if he doesn’t get the visa now, at least he will be able to apply again in the future.
Credit:stackoverflow.com‘