"My best wishes to our athletes participating in the Commonwealth Games at Glasgow. Am sure they will do our nation very proud," tweeted Modi.
"Apart from providing a wonderful opportunity for sportspersons to shine, events like CWG bring a spirit of unity & brotherhood among nations.
"We will certainly witness a celebration of both sports and sportsmanship in the coming days during," added Modi.
A 215-strong Indian contingent will take part in the Games.
India finished second behind Australia with a record 101 medal haul at the 2010 Delhi Games.