<P> Shadowhunters is an American supernatural drama television series . The series is based on the book series The Mortal Instruments by Cassandra Clare, and developed for television by Ed Decter . It premiered in North America on Freeform . In December 2015, Netflix acquired global rights to Shadowhunters, excluding the U.S., making the series available as an original series a day after the U.S. premiere . </P> <P> Shadowhunters follows Clary Fray (Katherine McNamara), who finds out on her birthday that she is not who she thinks she is but rather comes from a long line of Shadowhunters, human--angel hybrids who hunt down demons . The series is set in an urban and contemporary New York City . The show received a straight - to - series order on March 30, 2015, and premiered on January 12, 2016 on Freeform . </P> <P> In April 2017, it was announced that the series had been renewed for a third season of 20 episodes . The first half of ten episodes premiered on March 20, 2018 . In June 2018, Freeform canceled the series after three seasons, but ordered two extra episodes to properly conclude the series' story; the second half of the third season is set to air in early 2019 . As of May 15, 2018, 43 episodes of Shadowhunters have aired, concluding the first half of the third season . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 13 </Td> <Td_colspan="1"> January 12, 2016 (2016 - 01 - 12) </Td> <Td> April 5, 2016 (2016 - 04 - 05) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="1"> 20 </Td> <Td> 10 </Td> <Td_colspan="1"> January 2, 2017 (2017 - 01 - 02) </Td> <Td> March 6, 2017 (2017 - 03 - 06) </Td> </Tr> <Tr> <Td> 10 </Td> <Td_colspan="1"> June 5, 2017 (2017 - 06 - 05) </Td> <Td> August 14, 2017 (2017 - 08 - 14) </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="1"> 22 </Td> <Td> 10 </Td> <Td_colspan="1"> March 20, 2018 (2018 - 03 - 20) </Td> <Td> May 15, 2018 (2018 - 05 - 15) </Td> </Tr> <Tr> <Td> 12 </Td> <Td_colspan="1"> 2019 (2019) </Td> <Td> 2019 (2019) </Td> </Tr> </Table>

When does the second half of season 3 of shadowhunters come out