Taking to Twitter, Singh wrote, "Delighted to meet Major Ishwar Lal during the wreath-laying ceremony at INA marker in Singapore. Major Lal had served the Indian National Army under the leadership of Netaji Subhash Chandra. He is an embodiment of courage and bravery. I salute his service to INA and the nation."
Singh arrived in Singapore on Monday night after concluding his visit to Bangkok.
The two-day visit would witness him attending the India-Singapore Defence Ministers' Dialogue and calling on Prime Minister Lee Hsien Loong.