I want to drink beer because I feel stress of my life. However, I don't want to gain weight because I have been overweighted. Is there any diet beer in US?
This is what would be referred to as the "Light Beer" category. For the most part, this is mass-produced beer, done by the big commercial breweries in the USA (I don't know much about beer production outside North America).
If you want some good light beers, I'd suggest taking a look at lists like BeerAdvocate's Best Light Lagers
In Canada you can get Molson 67, which comes in at 3% alcohol and 67 calories for 12 ounces. That's about as light as there is.
Light beer is the closest thing to diet, but here's the catch: The majority of caloric content in beer is from alcohol. If you want really low calories you're going to be looking at really low alcohol beer.
Not really a win. Best thing to do is try to cut calories elsewhere, because at that point you're drinking tasteless light beer and not even getting the proper buzz.
This beer may be the best of all the light beer.
Bud Light (110 calories)
Something like Miller 64 is probably what you are looking for. But alcohol content is quite proportional to caloric content.
if you use the Google translator - here's a description of one of these diets пивная диета