1) picture is probably taken after 1945 (after the WW2);
2) he is not "Forest Brother" (Lithuanian Partizan from 1944-1965), nor "Saulys" ("Rifleman" paramilitary organization"), nor from Schuma or other German military unit;
3) it could be some refugee, from DP, somewhere in the West, with foreign military uniform (American? British? Canadian?...), and Lithuanain arm schield is only Lithuanian part of this strange uniform.
The photo was found in Germany, it could have connectiont to DP's, but then why a para-military look? Here's the answer I got from my friend Lithuanian who helped me on the subject:
"Nevertheless, the most reasonable explanation is that this photo presenting a “jaunalietuvį” (jauna(s)= young; lietuvį(is)=lithuanian >>>younglithuanian). The younglithuanians were called a Lithuanian political party (movement) which was driven by mostly young and enthusiastic people. And jaunalietuviai (younglithuanians) had a separate uniform. So this could explain an unusual uniform which could not be paralleled with military. The people which I talked say, that the unusual “hat” could be a fashion matter which came from Italian Mussolini fascist party (there it was used quite often).
They also say that the person which is in photo could be a “lower rank” juonglithuanian. "