"Why would my government take any action to deprive our people of jobs through the agreement," Sirisena said.
He said the criticism of the pact are "politically motivated".
The ETCA was proposed by Prime Minister Ranil Wickremesinghe when he visited India last September.
It seeks to boost cooperation in technical areas, scientific expertise and research among institutions, boost standards of goods and services able to compete on the global market and improve opportunities for manpower training and human resource development.
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The government denies the charge and accuses protesting groups of carrying out a public campaign without even knowing the contents of the pact. It says the agreement would expose Sri Lanka to the bigger Indian market.
Sirisena said the two sides are currently examining the draft of the agreement. His government remains committed to achieving national reconciliation with the Tamil minority.
"The war ended in May of 2009 but we are yet to address the root causes," he said adding his government was keen to leave no room for Tamils to take up arms again.
The current global economic down turn had affected the Sri Lankan economy, he said adding that remedial measures are being taken to minimise its impact.