If you want to visit Sweden and are a citizen of a non-EU country, you may need a visa. A visa is a permit to travel to and stay in a country for a maximum of 90 days. If you intend to stay in Sweden for longer than 90 days you will need a visitors’ residence permit.
Malian citizens need a visa and citizens from the following countries/territories also require a visa when entering Sweden, check the list.
Similarly, Sweden represents other Schengen states in a number of places. Here is a list of the countries and places where there are representations.
More information on how to apply for a visa or a residence permit is found on Swedish Migration Agency.