German President Joachim Gauck and Foreign Minister Guido Westerwelle have written to the top Indian leadership seeking clemency for Bhullar, SAD Delhi president Manjeet Singh GK told PTI.
The Supreme Court had last month dismissed Bhullar's plea that his death sentence be commuted to life imprisonment.
Bhullar has been given death penalty for triggering a bomb blast outside the Youth Congress office in the capital in September 1993, in which nine people were killed and 25 others were injured, including then Youth Congress president M S Bitta.