India's Deputy Election Commissioner Rengaraju Balakrishnan will form part of the 11-member Commonwealth Observer Group monitoring elections in Tanzania on October 30.
Women came out in large numbers to vote on Wednesday despite terror attacks and repeated threats.
Pakistan Prime Minister Imran Khan has ordered a probe into the matter.
Counting has begun for the election which will be the second democratic transition of power in the nation's 70-year history.
A single party will need at least 137 of the directly elected seats to be able to form the government on its own.
The February 13 meeting between Nancy Powell, who quit as United States ambassador to India on Monday, and Narendra Modi, the Bharatiya Janata Party's prime ministerial candidate, was frosty enough to convince the Roosevelt House (the official address of the US embassy in New Delhi) and the White House in Washington DC that much had to be done before US diplomats could aspire to any significant access to a Modi-led government in India.