diff --git a/NGitLab.Mock/Clients/IssueClient.cs b/NGitLab.Mock/Clients/IssueClient.cs
index 987b7e4c..39060718 100644
--- a/NGitLab.Mock/Clients/IssueClient.cs
+++ b/NGitLab.Mock/Clients/IssueClient.cs
@@ -451,4 +451,14 @@ private IEnumerable<Issue> FilterByQuery(IEnumerable<Issue> issues, IssueQuery q
 
         return issues;
     }
+
+    public IEnumerable<Participant> GetParticipants(ProjectId projectId, int issueIid)
+    {
+        throw new NotImplementedException();
+    }
+
+    public Models.Issue Unsubscribe(ProjectId projectId, int issueIid)
+    {
+        throw new NotImplementedException();
+    }
 }
diff --git a/NGitLab.Tests/IssueTests.cs b/NGitLab.Tests/IssueTests.cs
index 054a125b..862d23de 100644
--- a/NGitLab.Tests/IssueTests.cs
+++ b/NGitLab.Tests/IssueTests.cs
@@ -311,4 +311,18 @@ public async Task Test_get_linked_issue()
         // for now, no API to link issues so not links exist but API should not throw
         Assert.That(issues, Has.Count.EqualTo(1), $"Expected 1. Got {issues.Count}");
     }
+
+    [Test]
+    [NGitLabRetry]
+    public async Task Test_getparticipants_issue()
+    {
+        using var context = await GitLabTestContext.CreateAsync();
+        var project = context.CreateProject();
+        var issuesClient = context.Client.Issues;
+        var issue1 = issuesClient.Create(new IssueCreate { ProjectId = project.Id, Title = "title1", Confidential = true });
+
+        var participant = issuesClient.GetParticipants(project.Id, issue1.IssueId);
+
+        Assert.That(participant.Count, Is.EqualTo(1));
+    }
 }
diff --git a/NGitLab/IIssueClient.cs b/NGitLab/IIssueClient.cs
index 92628207..b842b796 100644
--- a/NGitLab/IIssueClient.cs
+++ b/NGitLab/IIssueClient.cs
@@ -180,4 +180,20 @@ public interface IIssueClient
     /// <param name="cancellationToken"></param>
     /// <returns></returns>
     Task<Issue> CloneAsync(int projectId, int issueIid, IssueClone issueClone, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Get Participants
+    /// </summary>
+    /// <param name="projectId">The project id</param>
+    /// <param name="issueIid">The id of the issue in the project's scope.</param>
+    /// <returns>The participants of the issue.</returns>
+    IEnumerable<Participant> GetParticipants(ProjectId projectId, int issueIid);
+
+    /// <summary>
+    /// Unsubscribe to the issue
+    /// </summary>
+    /// <param name="projectId">The project id</param>
+    /// <param name="issueIid">The id of the issue in the project's scope.</param>
+    /// <returns>The issue that corresponds to the project id and issue id</returns>
+    Issue Unsubscribe(ProjectId projectId, int issueIid);
 }
diff --git a/NGitLab/Impl/IssueClient.cs b/NGitLab/Impl/IssueClient.cs
index 6e6d731e..f67b1fe9 100644
--- a/NGitLab/Impl/IssueClient.cs
+++ b/NGitLab/Impl/IssueClient.cs
@@ -23,6 +23,8 @@ public class IssueClient : IIssueClient
     private const string ClosedByUrl = "/projects/{0}/issues/{1}/closed_by";
     private const string TimeStatsUrl = "/projects/{0}/issues/{1}/time_stats";
     private const string CloneIssueUrl = "/projects/{0}/issues/{1}/clone";
+    private const string ParticipantsUrl = "/projects/{0}/issues/{1}/participants";
+    private const string UnsubscribeUrl = "/projects/{0}/issues/{1}/unsubscribe";
 
     private readonly API _api;
 
@@ -192,6 +194,16 @@ public Task<Issue> CloneAsync(int projectId, int issueIid, IssueClone issueClone
         return _api.Post().With(issueClone).ToAsync<Issue>(string.Format(CultureInfo.InvariantCulture, CloneIssueUrl, projectId, issueIid), cancellationToken);
     }
 
+    public IEnumerable<Participant> GetParticipants(ProjectId projectId, int issueIid)
+    {
+        return _api.Get().GetAll<Participant>(string.Format(CultureInfo.InvariantCulture, ParticipantsUrl, projectId.ValueAsUriParameter(), issueIid));
+    }
+
+    public Issue Unsubscribe(ProjectId projectId, int issueIid)
+    {
+        return _api.Post().To<Issue>(string.Format(CultureInfo.InvariantCulture, UnsubscribeUrl, projectId.ValueAsUriParameter(), issueIid));
+    }
+
     private GitLabCollectionResponse<Issue> Get(string url, IssueQuery query)
     {
         url = AddIssueQueryParameters(url, query);
diff --git a/NGitLab/Models/Participant.cs b/NGitLab/Models/Participant.cs
new file mode 100644
index 00000000..2fd27034
--- /dev/null
+++ b/NGitLab/Models/Participant.cs
@@ -0,0 +1,24 @@
+using System.Text.Json.Serialization;
+
+namespace NGitLab.Models;
+
+public class Participant
+{
+    [JsonPropertyName("id")]
+    public int Id { get; set; }
+
+    [JsonPropertyName("name")]
+    public string Name { get; set; }
+
+    [JsonPropertyName("username")]
+    public string Username { get; set; }
+
+    [JsonPropertyName("state")]
+    public string State { get; set; }
+
+    [JsonPropertyName("avatar_url")]
+    public string AvatarURL { get; set; }
+
+    [JsonPropertyName("web_url")]
+    public string WebUrl { get; set; }
+}
diff --git a/NGitLab/PublicAPI.Unshipped.txt b/NGitLab/PublicAPI.Unshipped.txt
index 7506c8ec..57403c20 100644
--- a/NGitLab/PublicAPI.Unshipped.txt
+++ b/NGitLab/PublicAPI.Unshipped.txt
@@ -347,6 +347,7 @@ NGitLab.IIssueClient.GetAsync(int projectId, NGitLab.Models.IssueQuery query) ->
 NGitLab.IIssueClient.GetAsync(NGitLab.Models.IssueQuery query) -> NGitLab.GitLabCollectionResponse<NGitLab.Models.Issue>
 NGitLab.IIssueClient.GetById(int issueId) -> NGitLab.Models.Issue
 NGitLab.IIssueClient.GetByIdAsync(int issueId, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task<NGitLab.Models.Issue>
+NGitLab.IIssueClient.GetParticipants(NGitLab.Models.ProjectId projectId, int issueIid) -> System.Collections.Generic.IEnumerable<NGitLab.Models.Participant>
 NGitLab.IIssueClient.LinkedToAsync(int projectId, int issueId) -> NGitLab.GitLabCollectionResponse<NGitLab.Models.Issue>
 NGitLab.IIssueClient.Owned.get -> System.Collections.Generic.IEnumerable<NGitLab.Models.Issue>
 NGitLab.IIssueClient.RelatedTo(int projectId, int issueIid) -> System.Collections.Generic.IEnumerable<NGitLab.Models.MergeRequest>
@@ -358,6 +359,7 @@ NGitLab.IIssueClient.ResourceMilestoneEventsAsync(int projectId, int issueIid) -
 NGitLab.IIssueClient.ResourceStateEvents(int projectId, int issueIid) -> System.Collections.Generic.IEnumerable<NGitLab.Models.ResourceStateEvent>
 NGitLab.IIssueClient.ResourceStateEventsAsync(int projectId, int issueIid) -> NGitLab.GitLabCollectionResponse<NGitLab.Models.ResourceStateEvent>
 NGitLab.IIssueClient.TimeStatsAsync(int projectId, int issueIid, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task<NGitLab.Models.TimeStats>
+NGitLab.IIssueClient.Unsubscribe(NGitLab.Models.ProjectId projectId, int issueIid) -> NGitLab.Models.Issue
 NGitLab.IJobClient
 NGitLab.IJobClient.Get(int jobId) -> NGitLab.Models.Job
 NGitLab.IJobClient.GetAsync(int jobId, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task<NGitLab.Models.Job>
@@ -640,6 +642,7 @@ NGitLab.Impl.IssueClient.GetAsync(int projectId, NGitLab.Models.IssueQuery query
 NGitLab.Impl.IssueClient.GetAsync(NGitLab.Models.IssueQuery query) -> NGitLab.GitLabCollectionResponse<NGitLab.Models.Issue>
 NGitLab.Impl.IssueClient.GetById(int issueId) -> NGitLab.Models.Issue
 NGitLab.Impl.IssueClient.GetByIdAsync(int issueId, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task<NGitLab.Models.Issue>
+NGitLab.Impl.IssueClient.GetParticipants(NGitLab.Models.ProjectId projectId, int issueIid) -> System.Collections.Generic.IEnumerable<NGitLab.Models.Participant>
 NGitLab.Impl.IssueClient.IssueClient(NGitLab.Impl.API api) -> void
 NGitLab.Impl.IssueClient.LinkedToAsync(int projectId, int issueId) -> NGitLab.GitLabCollectionResponse<NGitLab.Models.Issue>
 NGitLab.Impl.IssueClient.Owned.get -> System.Collections.Generic.IEnumerable<NGitLab.Models.Issue>
@@ -652,6 +655,7 @@ NGitLab.Impl.IssueClient.ResourceMilestoneEventsAsync(int projectId, int issueIi
 NGitLab.Impl.IssueClient.ResourceStateEvents(int projectId, int issueIid) -> System.Collections.Generic.IEnumerable<NGitLab.Models.ResourceStateEvent>
 NGitLab.Impl.IssueClient.ResourceStateEventsAsync(int projectId, int issueIid) -> NGitLab.GitLabCollectionResponse<NGitLab.Models.ResourceStateEvent>
 NGitLab.Impl.IssueClient.TimeStatsAsync(int projectId, int issueIid, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task<NGitLab.Models.TimeStats>
+NGitLab.Impl.IssueClient.Unsubscribe(NGitLab.Models.ProjectId projectId, int issueIid) -> NGitLab.Models.Issue
 NGitLab.Impl.JobClient
 NGitLab.Impl.JobClient.Get(int jobId) -> NGitLab.Models.Job
 NGitLab.Impl.JobClient.GetAsync(int jobId, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) -> System.Threading.Tasks.Task<NGitLab.Models.Job>
@@ -2750,6 +2754,20 @@ NGitLab.Models.PageQuery<TQueryType>
 NGitLab.Models.PageQuery<TQueryType>.PageQuery(int page = 1, int perPage = 20, TQueryType query = default(TQueryType)) -> void
 NGitLab.Models.PageQuery<TQueryType>.Query.get -> TQueryType
 NGitLab.Models.PageQuery<TQueryType>.Query.set -> void
+NGitLab.Models.Participant
+NGitLab.Models.Participant.Participant() -> void
+NGitLab.Models.Participant.Id.get -> int
+NGitLab.Models.Participant.Id.set -> void
+NGitLab.Models.Participant.AvatarURL.get -> string
+NGitLab.Models.Participant.AvatarURL.set -> void
+NGitLab.Models.Participant.Name.get -> string
+NGitLab.Models.Participant.Name.set -> void
+NGitLab.Models.Participant.State.get -> string
+NGitLab.Models.Participant.State.set -> void
+NGitLab.Models.Participant.Username.get -> string
+NGitLab.Models.Participant.Username.set -> void
+NGitLab.Models.Participant.WebUrl.get -> string
+NGitLab.Models.Participant.WebUrl.set -> void
 NGitLab.Models.PersonInfo
 NGitLab.Models.PersonInfo.Email -> string
 NGitLab.Models.PersonInfo.Name -> string