Lothar Fendler (13 August 1913 – 7 March 1983) was an SS-Sturmbannführer, in Sonderkommando 4b of Einsatzgruppe C, which was involved in the mass murder of the Jews in occupied Ukraine.

From 1947 to 1948, Fendler was one of 24 defendants in the Einsatzgruppen Trial; his defence lawyer was Hans Fritz with the assistance of Dr. Gabriele Lehmann.

[1] The case against Fendler was based on the question of whether he reported as deputy leader to Günther Herrmann; this was not conclusively answered.

Fendler also confessed to writing reports about the morale about the local population while serving in the unit.

Furthermore, "as the second highest ranking officer in the Kommando, his views could have been heard in complaint or protest against what he now says was a too summary procedure, but he chose to let the injustice go uncorrected.

As part of the intensified discussion of West German rearmament after the outbreak of the Korean War in the summer of 1950, on 31 January 1951 High Commissioner for Germany John McCloy assessed the 15 death sentences handed down at Nuremberg on the recommendation of the "Advisory Board on Clemency for War Criminals".