West Indies have not played 50-over cricket since November 2014, when they lost to Australia 0-4. Sri Lanka have their own concerns against rust - the last time they played was in January and were beaten 3-0 by Pakistan.
Sri Lanka lead West Indies in the head-to-head battle - 13 wins in 24 games - but they have lost seven of the last 10 matches. Their T20 record against West Indies is a little more clear cut - 12 losses in 15 games.
The last three ODIs on the tour will account towards the ICC Women's Championship, where West Indies are ranked fifth on the points table and Sri Lanka are at seventh.
Sri Lanka squad Chamari Attapattu (capt), Prasadini Weerakkody, Nipuni Hansika, Sanduni Abeywickrema, Dilani Manodara, Shashikala Siriwardene, Eshani Kaushalya, Sripali Weerakkody, Ama Kanchana, Inoka Ranaweera, Sugandika Kumari, Lasanthi Madushani, Chathurani Gunewardene, Maduri Samuddhika.
Stand-by players Yasoda Mendis, Oshadi Ranasinghe, Udeshika Prabodhani, Achini Kulasooriya, Hasini Perera, Chamari Polgampola, Nilakshi de Silva