Here is a summary of scores from the first three rounds of play in the Cricket West Indies Regional Under-19 Super-50 tournament and a simple summary of wins and losses for each team.

Kindly note that Canada Under-19s is listed as ICC Americas Under-19s in the summary scores.
Two teams have a record of 2 wins and 0 losses: Guyana (2/0) and Trinidad & Tobago (2/0).
Windward Islands have won 2 and lost 1.
Two teams have won 1 and lost 2: ICC Americas (Canada) (1/2) and Jamaica (1/2)
Leeward Islands has won 1 and lost 2.
Barbados (0/2) has lost both games played in the first three rounds of the tournament.
The fourth round of matches is on Tuesday August 22, 2017 in St Kitts

Summary of Scores after Three Rounds of Matches

First Round of Matches: August 15, 2017

At Verchilds: Guyana Under-19s won by 148 runs

GUYANA 295 for seven off 50.0 overs (Kevin Sinclair 85, Raymond Perez 58, Ronaldo Ali Mohammed 49, Bhaskar Yadram 43: Akash Gill 3-40)

ICC AMERICAS UNDER-19s 147 for nine 50.0 overs (Bhavindu Adhihetty 36, Kavian Naress 20, Tiaan Pretoriius 19*; Bhaskar Yadram 4-24).

At Molineaux: Trinidad and Tobago Under-19s won by seven wickets

LEEWARD ISLANDS UNDER-19s 122 off 39.2 overs (Uri Smith 33, Kadeem Henry 27; A. Mahabirsingh 3-12, M. Patrick 3-18).

TRINIDAD & TOBAGO UNDER-19s 124 for three off 21.5 overs (L. Julien 41, Cephas Cooper 22 not out, Keagan Simmons 22; Shacoy Floyd 2-24).

At Conaree: Windward Islands Under-19s won by seven wickets

JAMAICA UNDER-19s 140 off 39.3 overs (Javier Royal 43, Brad Barnes 33; Shermill Lewis 4-20, Alick Athanaze 3-19).

WINDWARD ISLANDS UNDER-19s 141 for three off 34.4 overs (Emmanuel Stewart 76*, Johnnel Eugene 26)

Second Round of Matches: August 17, 2017

At St. Paul’s: Jamaica Under-19s won by four wickets

ICC AMERICAS UNDER-19s 194 all out off 48.5 overs (Akashdeep Gill 75, Arslan Khan 52; Javier Royal 9.5-1-32-6).

JAMAICA UNDER-19s 199 for six of 46.5 overs (Javier Royal 66 not out, Dominic Samuels 42, Stephan Pink 31, Raewin Senior 28; Rishiv Joshi 2-27).

At Molineaux: Leeward Islands Under-19s won by three wickets

WINDWARD ISLANDS UNDER-19s 135 off 40.5 overs (Darron Nedd 41, Alick Athanaze 29; Mikyle Louis 4-22, Shacoy Floyd 2-23).

LEEWARD ISLANDS UNDER-19s 136 for seven off 37.2 overs (Jamie Cornelius 61, Kadeem Henry 26; Sealron Williams 6-0-17-5).

At Conaree: Trinidad & Tobago Under-19s won by eight wickets

BARBADOS UNDER-19s 208 for eight off 40.5 overs (Nyeem Young 74, Shem Watson 32, Dante Niles 27 not out, Jarion Hoyte 24 not out; Aaron Maniram 4-18, Matthew Patrick 2-40).

TRINIDAD & TOBAGO UNDER-19s 209 for two off 38 overs (Cephas Cooper 85, Kristan Kallicharran 74 not out, Keagan Simmons 29).

Third Round of Matches: August 19, 2017

At Conaree: ICC Americas won by 15 runs.

ICC AMERICAS 158 for eight off 34 overs (Pranav Sharma 43, Bhavindu Adhihetty 30; Mykyle Louis 3-32, Uri Smith 3-29)

LEEWARD ISLANDS 143 for nine off 34 overs (Shacoy Floyd 34, Kadeem Henry 24; Bhavindu Adhihetty 4-34, Rommel Shahzad 3-18)

At Verchilds: Windwards won by 22 runs.

WINDWARD ISLANDS 135 for nine off 20 overs (Kimani Melius 71; Dante Niles 4-33, Camarie Boyce 2-14)

BARBADOS 113 for eight off 20 overs (Shian Brathwaite 38, Nico Reifer 24; Alick Athanaze 3-13, Shermill Lewis 2-20)

At Molineaux: Guyana won by 16 runs.

GUYANA 158 off 37.1 overs (Raymond Perez 39, Ramnarine Chatura 33, Kevelon Anderson 26 not out; Kristoph Virgo 3-26, Jeavor Royal 2-25)

JAMAICA 142 off 40.2 overs (Brad Barnes 42, Jeavor Royal 36; Ronaldo Ali Mohammed 4-19, Ashmead Nedd 2-29, Bhaskar Yadram 2-39)