Sure, because it doesn't include the number of people who have become discouraged and are no longer seeking jobs, nor does it include the underemployed.
According to the Related Link below, Bangladesh had an unemployment rate of only 2.5 % (but its data was reported in 2008). The Link has all the countries rates, and by different dates.
In the case of the United States, yes it does. It also contributes to the crisis by allowing the loss of capital, and if the government does not do anything about that, it ultimately could contribute...