Swaraj and Wang both are in the Nepalese capital to attend the International Conference on Nepal's Reconstruction being organised by the Nepalese government to raise funds for carrying out rebuilding of areas devastated by the massive earthquake of April 25 that left nearly 9,000 people dead.
The two leaders are expected to discuss a host of issues of bilateral and regional interests.
Lakhvi, 55, a close relative of LeT founder and Jamaat-Ud Dawa (JuD) chief Hafiz Saeed, was arrested in December 2008 and was indicted along with the six others on November 25, 2009 in connection with the 26/11 attack case.
A Pakistani court had on April 9 set free Lakhvi, a development which India said "eroded" the value of assurances repeatedly conveyed to it by Pakistan on cross-border terrorism.