Here are a few options for translating the headline into Swedish, ranging from direct to slightly more natural phrasing.

Option 1 (Direct translation):

M23 utesluts från försoningssamtalen i Kongo-Kinshasa

Option 2 (More active phrasing):

M23 hålls utanför försoningssamtalen i Kongo-Kinshasa

Option 3 (Slightly more formal/editorial):

Kongo-Kinshasa utesluter M23 från försoningssamtal

Note on terminology: In Swedish, the country is usually referred to as Kongo-Kinshasa (to distinguish it from Kongo-Brazzaville). It is also common to see just ”DR Kongo”. The term ”försoningssamtal” (reconciliation talks) is the most accurate translation for this context.