"We have put out the criterion for visits by naval ships. Under that, ships including submarines from all countries can visit Sri Lanka. As far as we are concerned if it is a friendly visit we will inform the neighbouring countries and we will spread out the (frequency of the) visits," he said in an interview published in The Straits Times.
Wickremesinghe suggested that some of the mistrust could have been avoided if India had been kept in the picture about the visit by the Chinese submarine, which was en route to deployment in the Gulf of Aden.
Wickremesinghe, ended a four-day visit to Singapore yesterday.
He met Prime Minister Lee Hsien Loong, Deputy Prime Minister Tharman Shanmugaratnam, and other ministers during the visit.
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In future, Sri Lanka will set out definite criteria for calls by foreign naval ships.
He also touched on Sri Lanka's economic cooperation.
"We are doing an Economic and Technological Cooperation Partnership with India. A Free Trade Agreement (FTA) with China will follow and hopefully, also with Singapore after that."
"We have an FTA with India but we have to upgrade it to economic and technological collaboration. We are looking at (India's strengths in) software, and Indians are looking at what they can get from us. The new Indian government is favourable to it," he said.