Male jacks are either:
TS (tip & sleeve)
or
TRS (tip, RING, sleeve)
So, TS and TR are the same.. you don't get the RING without the slleve below it to make it..
Not all TRS jacks are stereo, this is also a way to balance a cable...
Now the question is can your recorder take unbalanced in? Probably yes, if so you may have the correct cable now.. Time to get the manual out....